./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --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_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/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_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/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_6e60039b-5470-41f3-94b5-21e314351ae8/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 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- 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 21:04:02,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:04:02,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:04:02,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:04:02,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:04:02,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:04:02,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:04:02,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:04:02,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:04:02,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:04:02,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:04:02,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:04:02,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:04:02,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:04:02,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:04:02,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:04:02,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:04:02,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:04:02,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:04:02,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:04:02,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:04:02,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:04:02,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:04:02,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:04:02,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:04:02,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:04:02,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:04:02,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:04:02,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:04:02,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:04:02,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:04:02,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:04:02,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:04:02,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:04:02,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:04:02,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:04:02,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:04:02,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:04:02,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:04:02,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:04:02,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:04:02,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 21:04:02,428 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:04:02,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:04:02,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:04:02,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:04:02,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:04:02,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:04:02,430 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:04:02,430 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:04:02,430 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:04:02,430 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:04:02,431 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:04:02,431 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:04:02,431 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:04:02,431 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:04:02,432 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:04:02,432 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:04:02,432 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:04:02,432 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:04:02,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:04:02,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:04:02,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:04:02,434 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:04:02,434 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:04:02,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:04:02,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:04:02,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:04:02,435 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:04:02,435 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:04:02,435 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 21:04:02,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:04:02,436 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:04:02,436 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:04:02,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:04:02,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:04:02,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:04:02,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:04:02,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:04:02,437 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:04:02,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:04:02,438 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:04:02,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:04:02,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:04:02,438 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_6e60039b-5470-41f3-94b5-21e314351ae8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2022-11-20 21:04:02,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:04:02,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:04:02,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:04:02,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:04:02,717 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:04:02,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2022-11-20 21:04:05,733 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:04:05,986 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:04:05,987 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2022-11-20 21:04:06,018 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/data/e4d64f88d/3c70ef43dd8e48ff912be65174e24a02/FLAGe102010b8 [2022-11-20 21:04:06,043 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/data/e4d64f88d/3c70ef43dd8e48ff912be65174e24a02 [2022-11-20 21:04:06,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:04:06,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:04:06,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:04:06,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:04:06,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:04:06,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58252dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06, skipping insertion in model container [2022-11-20 21:04:06,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:04:06,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:04:06,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:04:06,310 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:04:06,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:04:06,338 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:04:06,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06 WrapperNode [2022-11-20 21:04:06,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:04:06,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:04:06,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:04:06,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:04:06,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,385 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-20 21:04:06,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:04:06,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:04:06,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:04:06,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:04:06,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,407 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:04:06,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:04:06,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:04:06,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:04:06,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (1/1) ... [2022-11-20 21:04:06,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:04:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:06,461 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:04:06,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:04:06,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 21:04:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:04:06,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:04:06,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 21:04:06,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:04:06,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:04:06,582 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:04:06,585 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:04:06,877 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:04:06,964 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:04:06,965 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 21:04:06,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:04:06 BoogieIcfgContainer [2022-11-20 21:04:06,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:04:06,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:04:06,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:04:06,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:04:06,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:04:06" (1/3) ... [2022-11-20 21:04:06,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2666401e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:04:06, skipping insertion in model container [2022-11-20 21:04:06,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:06" (2/3) ... [2022-11-20 21:04:06,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2666401e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:04:06, skipping insertion in model container [2022-11-20 21:04:06,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:04:06" (3/3) ... [2022-11-20 21:04:06,977 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2022-11-20 21:04:07,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:04:07,001 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-20 21:04:07,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:04:07,080 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;@30694db0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:04:07,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-20 21:04:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 21:04:07,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:07,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 21:04:07,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:07,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:07,103 INFO L85 PathProgramCache]: Analyzing trace with hash 3271901, now seen corresponding path program 1 times [2022-11-20 21:04:07,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:07,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999167470] [2022-11-20 21:04:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:07,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:07,473 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 21:04:07,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999167470] [2022-11-20 21:04:07,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999167470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:07,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:07,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:07,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230776426] [2022-11-20 21:04:07,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:07,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:07,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:07,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:07,550 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:07,621 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-20 21:04:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 21:04:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:07,632 INFO L225 Difference]: With dead ends: 37 [2022-11-20 21:04:07,632 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 21:04:07,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:07,638 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:07,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 21:04:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2022-11-20 21:04:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-20 21:04:07,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2022-11-20 21:04:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:07,668 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-20 21:04:07,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-20 21:04:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 21:04:07,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:07,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 21:04:07,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:04:07,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:07,671 INFO L85 PathProgramCache]: Analyzing trace with hash 3197824, now seen corresponding path program 1 times [2022-11-20 21:04:07,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:07,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054086937] [2022-11-20 21:04:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:07,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:07,820 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 21:04:07,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:07,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054086937] [2022-11-20 21:04:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054086937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:07,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:07,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:07,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31220832] [2022-11-20 21:04:07,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:07,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:07,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:07,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:07,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:07,826 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:07,879 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-20 21:04:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:07,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 21:04:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:07,884 INFO L225 Difference]: With dead ends: 37 [2022-11-20 21:04:07,884 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 21:04:07,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:07,889 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:07,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:04:07,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 21:04:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-11-20 21:04:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-20 21:04:07,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2022-11-20 21:04:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:07,902 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-20 21:04:07,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-20 21:04:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 21:04:07,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:07,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 21:04:07,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:04:07,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:07,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:07,906 INFO L85 PathProgramCache]: Analyzing trace with hash 3199854, now seen corresponding path program 1 times [2022-11-20 21:04:07,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:07,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350857924] [2022-11-20 21:04:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:07,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:08,020 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 21:04:08,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:08,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350857924] [2022-11-20 21:04:08,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350857924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:08,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:08,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:08,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478086594] [2022-11-20 21:04:08,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:08,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:08,026 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:08,073 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-20 21:04:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 21:04:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:08,074 INFO L225 Difference]: With dead ends: 25 [2022-11-20 21:04:08,075 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 21:04:08,076 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 21:04:08,080 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:08,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:04:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 21:04:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-20 21:04:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-20 21:04:08,088 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2022-11-20 21:04:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:08,088 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-20 21:04:08,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-20 21:04:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:04:08,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:08,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:04:08,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:04:08,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:08,090 INFO L85 PathProgramCache]: Analyzing trace with hash 99132597, now seen corresponding path program 1 times [2022-11-20 21:04:08,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:08,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727670233] [2022-11-20 21:04:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:08,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:08,177 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 21:04:08,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:08,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727670233] [2022-11-20 21:04:08,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727670233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:08,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:08,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901812430] [2022-11-20 21:04:08,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:08,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:08,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:08,180 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:08,218 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-20 21:04:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:04:08,219 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 21:04:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:08,219 INFO L225 Difference]: With dead ends: 21 [2022-11-20 21:04:08,219 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 21:04:08,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 21:04:08,221 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:08,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:04:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 21:04:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 21:04:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-20 21:04:08,225 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2022-11-20 21:04:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:08,226 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-20 21:04:08,226 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-20 21:04:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:04:08,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:08,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:04:08,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:04:08,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash 99132598, now seen corresponding path program 1 times [2022-11-20 21:04:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:08,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733292335] [2022-11-20 21:04:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:08,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:08,370 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 21:04:08,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:08,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733292335] [2022-11-20 21:04:08,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733292335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:08,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:08,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:08,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852705174] [2022-11-20 21:04:08,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:08,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:08,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:08,376 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:08,450 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-11-20 21:04:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:04:08,451 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 21:04:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:08,454 INFO L225 Difference]: With dead ends: 22 [2022-11-20 21:04:08,454 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 21:04:08,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 21:04:08,460 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:08,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:04:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 21:04:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-20 21:04:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-20 21:04:08,472 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2022-11-20 21:04:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:08,472 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-20 21:04:08,472 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-20 21:04:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:04:08,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:08,476 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-20 21:04:08,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:04:08,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:08,478 INFO L85 PathProgramCache]: Analyzing trace with hash 777198637, now seen corresponding path program 1 times [2022-11-20 21:04:08,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:08,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637612752] [2022-11-20 21:04:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:08,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:08,596 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 21:04:08,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:08,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637612752] [2022-11-20 21:04:08,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637612752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:08,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417209431] [2022-11-20 21:04:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:08,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:08,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:08,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:08,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:04:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:08,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:04:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:08,696 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 21:04:08,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:08,729 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 21:04:08,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417209431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:08,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [925699773] [2022-11-20 21:04:08,749 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 21:04:08,749 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:08,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:08,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:08,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:08,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:08,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:08,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:09,193 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 247 treesize of output 249 [2022-11-20 21:04:09,390 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 15 treesize of output 14 [2022-11-20 21:04:09,474 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:09,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [925699773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:09,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:09,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2022-11-20 21:04:09,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033548236] [2022-11-20 21:04:09,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:09,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:09,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:09,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:04:09,929 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:10,460 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-20 21:04:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:10,461 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:04:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:10,461 INFO L225 Difference]: With dead ends: 30 [2022-11-20 21:04:10,461 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 21:04:10,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:04:10,462 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:10,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 13 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 21:04:10,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-20 21:04:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-20 21:04:10,466 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2022-11-20 21:04:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:10,466 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-20 21:04:10,466 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-20 21:04:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:04:10,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:10,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2022-11-20 21:04:10,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:10,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:10,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1676645975, now seen corresponding path program 1 times [2022-11-20 21:04:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:10,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801921160] [2022-11-20 21:04:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:10,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:10,843 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 21:04:10,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:10,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801921160] [2022-11-20 21:04:10,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801921160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:10,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034578446] [2022-11-20 21:04:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:10,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:10,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:10,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:10,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:04:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:04:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:10,972 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:04:10,972 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 21:04:11,032 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 21:04:11,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:11,110 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 21:04:11,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034578446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:11,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1468810848] [2022-11-20 21:04:11,114 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 21:04:11,114 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:11,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:11,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:11,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:11,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:11,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:11,189 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 10 treesize of output 9 [2022-11-20 21:04:11,391 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-20 21:04:11,392 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 237 treesize of output 243 [2022-11-20 21:04:11,558 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 15 treesize of output 14 [2022-11-20 21:04:11,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:12,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '452#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 32 |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= 32 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 32) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:12,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:12,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:12,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-20 21:04:12,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801338285] [2022-11-20 21:04:12,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:12,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:04:12,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:12,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:04:12,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:04:12,296 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:12,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:12,518 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2022-11-20 21:04:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:04:12,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:04:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:12,523 INFO L225 Difference]: With dead ends: 88 [2022-11-20 21:04:12,523 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 21:04:12,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:04:12,524 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 188 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:12,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 21 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 21:04:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2022-11-20 21:04:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.5) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-11-20 21:04:12,530 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 8 [2022-11-20 21:04:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:12,530 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-11-20 21:04:12,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-11-20 21:04:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:12,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:12,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:12,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:12,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:12,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:12,736 INFO L85 PathProgramCache]: Analyzing trace with hash -582317421, now seen corresponding path program 1 times [2022-11-20 21:04:12,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:12,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539295780] [2022-11-20 21:04:12,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:12,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:12,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:12,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539295780] [2022-11-20 21:04:12,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539295780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:12,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:12,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:12,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742496653] [2022-11-20 21:04:12,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:12,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:12,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:12,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:12,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:12,782 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:12,806 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-11-20 21:04:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:12,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:04:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:12,809 INFO L225 Difference]: With dead ends: 45 [2022-11-20 21:04:12,809 INFO L226 Difference]: Without dead ends: 45 [2022-11-20 21:04:12,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:12,810 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:12,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:04:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-20 21:04:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-20 21:04:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.45) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2022-11-20 21:04:12,825 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 10 [2022-11-20 21:04:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:12,825 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2022-11-20 21:04:12,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2022-11-20 21:04:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:12,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:12,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:12,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 21:04:12,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:12,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash -582317420, now seen corresponding path program 1 times [2022-11-20 21:04:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:12,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201439881] [2022-11-20 21:04:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:12,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:12,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:12,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201439881] [2022-11-20 21:04:12,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201439881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:12,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776172196] [2022-11-20 21:04:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:12,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:12,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:12,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:12,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:04:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:04:13,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:13,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:13,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776172196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:13,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253125675] [2022-11-20 21:04:13,080 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:04:13,080 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:13,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:13,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:13,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:13,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:13,145 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 15 treesize of output 14 [2022-11-20 21:04:13,286 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 247 treesize of output 249 [2022-11-20 21:04:13,407 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 15 treesize of output 14 [2022-11-20 21:04:13,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:13,542 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 10 treesize of output 9 [2022-11-20 21:04:13,611 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 15 treesize of output 14 [2022-11-20 21:04:13,685 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 15 treesize of output 14 [2022-11-20 21:04:13,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:13,852 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 15 treesize of output 14 [2022-11-20 21:04:13,957 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 15 treesize of output 14 [2022-11-20 21:04:14,031 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 15 treesize of output 14 [2022-11-20 21:04:14,068 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:14,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '757#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:14,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:14,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:14,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2022-11-20 21:04:14,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582411329] [2022-11-20 21:04:14,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:14,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:04:14,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:14,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:04:14,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:04:14,709 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:14,929 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-11-20 21:04:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:04:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:04:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:14,930 INFO L225 Difference]: With dead ends: 49 [2022-11-20 21:04:14,930 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 21:04:14,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-11-20 21:04:14,931 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:14,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 5 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 21:04:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-11-20 21:04:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-20 21:04:14,934 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 10 [2022-11-20 21:04:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:14,934 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-20 21:04:14,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-20 21:04:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 21:04:14,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:14,935 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2022-11-20 21:04:14,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:15,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 21:04:15,146 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1961540342, now seen corresponding path program 2 times [2022-11-20 21:04:15,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:15,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821144395] [2022-11-20 21:04:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:15,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:15,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:15,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821144395] [2022-11-20 21:04:15,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821144395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:15,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526760737] [2022-11-20 21:04:15,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:04:15,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:15,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:15,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:15,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:04:15,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:04:15,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:04:15,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:04:15,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:15,556 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:04:15,556 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 21:04:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 21:04:15,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 21:04:15,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526760737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1873008343] [2022-11-20 21:04:15,927 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 21:04:15,927 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:15,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:15,927 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:15,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:15,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:15,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:15,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-20 21:04:16,121 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-20 21:04:16,122 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 237 treesize of output 243 [2022-11-20 21:04:16,262 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 15 treesize of output 14 [2022-11-20 21:04:16,305 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:17,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '988#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 32 |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= 32 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 32) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:17,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:17,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:17,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-11-20 21:04:17,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037646756] [2022-11-20 21:04:17,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:17,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 21:04:17,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:17,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 21:04:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:04:17,186 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:17,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:17,791 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-11-20 21:04:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 21:04:17,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 21:04:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:17,792 INFO L225 Difference]: With dead ends: 76 [2022-11-20 21:04:17,792 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 21:04:17,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 21:04:17,794 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 145 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:17,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 18 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:04:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 21:04:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 40. [2022-11-20 21:04:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-11-20 21:04:17,797 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 17 [2022-11-20 21:04:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:17,797 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-11-20 21:04:17,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-11-20 21:04:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 21:04:17,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:17,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:17,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:18,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:18,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:18,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash 173611545, now seen corresponding path program 1 times [2022-11-20 21:04:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:18,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752085740] [2022-11-20 21:04:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:18,131 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 21:04:18,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:18,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752085740] [2022-11-20 21:04:18,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752085740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:18,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535089095] [2022-11-20 21:04:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:18,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:18,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:18,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:18,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:04:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:04:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:18,308 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 21:04:18,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:18,414 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 21:04:18,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535089095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:18,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [822990675] [2022-11-20 21:04:18,417 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-20 21:04:18,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:18,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:18,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:18,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:18,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:18,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:18,463 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 10 treesize of output 9 [2022-11-20 21:04:18,598 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-20 21:04:18,599 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 237 treesize of output 243 [2022-11-20 21:04:18,726 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 15 treesize of output 14 [2022-11-20 21:04:18,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:18,832 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 15 treesize of output 14 [2022-11-20 21:04:18,918 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 15 treesize of output 14 [2022-11-20 21:04:18,982 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 15 treesize of output 14 [2022-11-20 21:04:19,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:19,100 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 21:04:19,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:19,163 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 10 treesize of output 9 [2022-11-20 21:04:19,266 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 15 treesize of output 14 [2022-11-20 21:04:19,329 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 15 treesize of output 14 [2022-11-20 21:04:19,374 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:20,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1271#(and (= |ULTIMATE.start_main_~i~1#1| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_25| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_25|) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_25|) 0) (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_25|)) (not (= 32 (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_25|) (* |ULTIMATE.start_main_~i~1#1| 4)))))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:20,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:20,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:20,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-20 21:04:20,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565908920] [2022-11-20 21:04:20,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:20,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:04:20,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:04:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-11-20 21:04:20,266 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:20,356 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-11-20 21:04:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:04:20,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 21:04:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:20,357 INFO L225 Difference]: With dead ends: 76 [2022-11-20 21:04:20,357 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 21:04:20,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-11-20 21:04:20,358 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:20,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 31 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 21:04:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-20 21:04:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 73 states have (on average 1.095890410958904) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-11-20 21:04:20,363 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 21 [2022-11-20 21:04:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:20,363 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-11-20 21:04:20,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-11-20 21:04:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 21:04:20,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:20,364 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:20,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:20,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 21:04:20,565 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1543681913, now seen corresponding path program 2 times [2022-11-20 21:04:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:20,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796017373] [2022-11-20 21:04:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:20,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:20,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:20,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796017373] [2022-11-20 21:04:20,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796017373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:20,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495242370] [2022-11-20 21:04:20,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:04:20,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:20,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:20,935 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:20,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:04:20,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:04:20,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:04:20,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:04:21,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:21,263 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_19| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_26| Int) (v_ArrVal_163 Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| 1))) (and (= (select .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_19|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26|) 0) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_19| v_ArrVal_163) |v_ULTIMATE.start_main_~#b~0#1.base_26| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_19| 0))))) is different from true [2022-11-20 21:04:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-20 21:04:21,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495242370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:21,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:04:21,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 15 [2022-11-20 21:04:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889976920] [2022-11-20 21:04:21,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:21,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:21,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=103, Unknown=1, NotChecked=24, Total=210 [2022-11-20 21:04:21,266 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:21,270 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-11-20 21:04:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:04:21,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 21:04:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:21,271 INFO L225 Difference]: With dead ends: 78 [2022-11-20 21:04:21,271 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 21:04:21,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=103, Unknown=1, NotChecked=24, Total=210 [2022-11-20 21:04:21,272 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:21,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-11-20 21:04:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 21:04:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-20 21:04:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 76 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-11-20 21:04:21,276 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 39 [2022-11-20 21:04:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:21,277 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-11-20 21:04:21,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-11-20 21:04:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 21:04:21,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:21,278 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:21,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:21,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:21,484 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash 609504323, now seen corresponding path program 1 times [2022-11-20 21:04:21,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:21,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497987995] [2022-11-20 21:04:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:21,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:21,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497987995] [2022-11-20 21:04:21,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497987995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:21,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170816903] [2022-11-20 21:04:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:21,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:21,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:21,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:21,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:04:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:21,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:04:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:22,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:22,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170816903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1981621229] [2022-11-20 21:04:22,648 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-20 21:04:22,648 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:22,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:22,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:22,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:22,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:22,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:22,713 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 15 treesize of output 14 [2022-11-20 21:04:22,836 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 247 treesize of output 249 [2022-11-20 21:04:22,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:22,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:23,030 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 10 treesize of output 9 [2022-11-20 21:04:23,083 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 15 treesize of output 14 [2022-11-20 21:04:23,140 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 15 treesize of output 14 [2022-11-20 21:04:23,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:23,310 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 21:04:23,311 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:23,356 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 15 treesize of output 14 [2022-11-20 21:04:23,415 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 15 treesize of output 14 [2022-11-20 21:04:23,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:23,510 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:24,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1984#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_20| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#mask~0#1.base_20|) (= (select |#valid| |v_ULTIMATE.start_main_~#mask~0#1.base_20|) 0))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32)) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:24,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:24,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:24,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-11-20 21:04:24,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507061869] [2022-11-20 21:04:24,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:24,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 21:04:24,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 21:04:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=1240, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 21:04:24,885 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 35 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:25,044 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2022-11-20 21:04:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 21:04:25,045 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 35 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-20 21:04:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:25,046 INFO L225 Difference]: With dead ends: 149 [2022-11-20 21:04:25,046 INFO L226 Difference]: Without dead ends: 149 [2022-11-20 21:04:25,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=566, Invalid=1240, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 21:04:25,048 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:25,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 36 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-20 21:04:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-20 21:04:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 146 states have (on average 1.047945205479452) internal successors, (153), 148 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-11-20 21:04:25,055 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 40 [2022-11-20 21:04:25,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:25,056 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-11-20 21:04:25,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 35 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:25,056 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-11-20 21:04:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 21:04:25,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:25,058 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:25,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:25,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:25,264 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:25,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1305267837, now seen corresponding path program 2 times [2022-11-20 21:04:25,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:25,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60525200] [2022-11-20 21:04:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:25,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:26,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:26,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60525200] [2022-11-20 21:04:26,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60525200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:26,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822684270] [2022-11-20 21:04:26,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:04:26,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:26,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:26,199 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:26,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:04:26,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:04:26,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:04:26,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:04:26,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:26,835 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_269 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_28| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_21| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_28| 1))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_28|) 0) (= (select .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_21|) 0) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_21| v_ArrVal_269) |v_ULTIMATE.start_main_~#b~0#1.base_28| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_21| 0))))) is different from true [2022-11-20 21:04:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2022-11-20 21:04:26,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:26,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822684270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:26,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:04:26,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [25] total 27 [2022-11-20 21:04:26,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727593737] [2022-11-20 21:04:26,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:26,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:26,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=349, Unknown=1, NotChecked=48, Total=702 [2022-11-20 21:04:26,839 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:26,842 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2022-11-20 21:04:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:04:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-20 21:04:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:26,844 INFO L225 Difference]: With dead ends: 150 [2022-11-20 21:04:26,844 INFO L226 Difference]: Without dead ends: 149 [2022-11-20 21:04:26,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=304, Invalid=349, Unknown=1, NotChecked=48, Total=702 [2022-11-20 21:04:26,845 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:26,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-11-20 21:04:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-20 21:04:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-20 21:04:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 146 states have (on average 1.0410958904109588) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-11-20 21:04:26,851 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 76 [2022-11-20 21:04:26,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:26,851 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-11-20 21:04:26,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-11-20 21:04:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 21:04:26,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:26,853 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:26,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:27,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 21:04:27,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1305268813, now seen corresponding path program 1 times [2022-11-20 21:04:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:27,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007748963] [2022-11-20 21:04:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:27,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:27,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007748963] [2022-11-20 21:04:27,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007748963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961168731] [2022-11-20 21:04:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:27,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:27,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:27,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:27,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:04:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:28,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:04:28,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:29,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:30,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961168731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:30,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1536267391] [2022-11-20 21:04:30,345 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:04:30,345 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:30,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:30,345 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:30,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:30,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:30,388 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 10 treesize of output 9 [2022-11-20 21:04:30,530 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-20 21:04:30,530 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 237 treesize of output 243 [2022-11-20 21:04:30,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:30,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:30,719 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 10 treesize of output 9 [2022-11-20 21:04:30,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:30,827 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 15 treesize of output 14 [2022-11-20 21:04:30,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:30,912 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 10 treesize of output 9 [2022-11-20 21:04:30,972 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 15 treesize of output 14 [2022-11-20 21:04:31,027 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 15 treesize of output 14 [2022-11-20 21:04:31,147 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:33,981 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3362#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:33,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:33,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:33,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2022-11-20 21:04:33,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193128075] [2022-11-20 21:04:33,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:33,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-20 21:04:33,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-20 21:04:33,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2075, Invalid=3931, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 21:04:33,987 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 71 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:34,224 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2022-11-20 21:04:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 21:04:34,225 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 71 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-20 21:04:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:34,226 INFO L225 Difference]: With dead ends: 209 [2022-11-20 21:04:34,226 INFO L226 Difference]: Without dead ends: 209 [2022-11-20 21:04:34,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 151 SyntacticMatches, 24 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3417 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3931, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 21:04:34,228 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:34,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 66 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:04:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-20 21:04:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-11-20 21:04:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 206 states have (on average 1.029126213592233) internal successors, (212), 208 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2022-11-20 21:04:34,239 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 76 [2022-11-20 21:04:34,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:34,239 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2022-11-20 21:04:34,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 71 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2022-11-20 21:04:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-20 21:04:34,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:34,241 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:34,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:34,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 21:04:34,447 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:34,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:34,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1847233005, now seen corresponding path program 2 times [2022-11-20 21:04:34,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:34,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532521465] [2022-11-20 21:04:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:34,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2022-11-20 21:04:34,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:34,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532521465] [2022-11-20 21:04:34,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532521465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:34,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093507925] [2022-11-20 21:04:34,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:04:34,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:34,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:34,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 21:04:34,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:04:34,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:04:34,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:04:34,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2022-11-20 21:04:35,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2022-11-20 21:04:35,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093507925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:35,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970303586] [2022-11-20 21:04:35,374 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:04:35,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:35,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:35,375 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:35,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:35,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:35,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:35,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-20 21:04:35,535 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-20 21:04:35,535 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 237 treesize of output 243 [2022-11-20 21:04:35,648 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 15 treesize of output 14 [2022-11-20 21:04:35,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:35,749 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 10 treesize of output 9 [2022-11-20 21:04:35,795 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 15 treesize of output 14 [2022-11-20 21:04:35,848 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 15 treesize of output 14 [2022-11-20 21:04:35,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:35,945 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 10 treesize of output 9 [2022-11-20 21:04:36,006 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 15 treesize of output 14 [2022-11-20 21:04:36,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:36,162 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:37,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4426#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:37,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:37,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:37,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 8 [2022-11-20 21:04:37,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362140651] [2022-11-20 21:04:37,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:37,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:04:37,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:37,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:04:37,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:04:37,808 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:37,940 INFO L93 Difference]: Finished difference Result 423 states and 428 transitions. [2022-11-20 21:04:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:04:37,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-11-20 21:04:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:37,950 INFO L225 Difference]: With dead ends: 423 [2022-11-20 21:04:37,950 INFO L226 Difference]: Without dead ends: 423 [2022-11-20 21:04:37,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 272 SyntacticMatches, 33 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:04:37,951 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:37,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 26 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-20 21:04:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 408. [2022-11-20 21:04:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 407 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 415 transitions. [2022-11-20 21:04:37,963 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 415 transitions. Word has length 106 [2022-11-20 21:04:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:37,965 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 415 transitions. [2022-11-20 21:04:37,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 415 transitions. [2022-11-20 21:04:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-20 21:04:37,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:37,980 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 2, 2, 1, 1, 1] [2022-11-20 21:04:37,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:38,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 21:04:38,187 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash 890597571, now seen corresponding path program 1 times [2022-11-20 21:04:38,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:38,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128824034] [2022-11-20 21:04:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:38,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2022-11-20 21:04:39,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128824034] [2022-11-20 21:04:39,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128824034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498107253] [2022-11-20 21:04:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:39,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:39,167 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:39,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:04:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:39,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:04:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:39,416 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:04:39,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 21:04:39,428 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 21:04:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2022-11-20 21:04:40,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2022-11-20 21:04:41,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498107253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:41,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629293753] [2022-11-20 21:04:41,549 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 21:04:41,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:41,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:41,549 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:41,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:41,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:41,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-20 21:04:41,745 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-20 21:04:41,745 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 237 treesize of output 243 [2022-11-20 21:04:41,859 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 15 treesize of output 14 [2022-11-20 21:04:41,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:41,941 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 10 treesize of output 9 [2022-11-20 21:04:41,997 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 15 treesize of output 14 [2022-11-20 21:04:42,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:42,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:42,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:42,191 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 15 treesize of output 14 [2022-11-20 21:04:42,280 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 15 treesize of output 14 [2022-11-20 21:04:42,313 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:44,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6464#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (<= 32 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= 32 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|)) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 32) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647) (= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:44,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:44,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:44,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2022-11-20 21:04:44,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074245662] [2022-11-20 21:04:44,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:44,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:04:44,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:44,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:04:44,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:04:44,885 INFO L87 Difference]: Start difference. First operand 408 states and 415 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:45,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:45,016 INFO L93 Difference]: Finished difference Result 506 states and 512 transitions. [2022-11-20 21:04:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:04:45,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-20 21:04:45,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:45,019 INFO L225 Difference]: With dead ends: 506 [2022-11-20 21:04:45,019 INFO L226 Difference]: Without dead ends: 506 [2022-11-20 21:04:45,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 521 SyntacticMatches, 64 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:04:45,020 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:45,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 27 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:45,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-20 21:04:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-11-20 21:04:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 503 states have (on average 1.0178926441351888) internal successors, (512), 505 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 512 transitions. [2022-11-20 21:04:45,028 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 512 transitions. Word has length 199 [2022-11-20 21:04:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:45,029 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 512 transitions. [2022-11-20 21:04:45,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:45,029 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 512 transitions. [2022-11-20 21:04:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-11-20 21:04:45,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:45,036 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2022-11-20 21:04:45,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:45,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 21:04:45,243 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:04:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:45,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1730373351, now seen corresponding path program 3 times [2022-11-20 21:04:45,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:45,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835568018] [2022-11-20 21:04:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:45,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24920 backedges. 0 proven. 18838 refuted. 0 times theorem prover too weak. 6082 trivial. 0 not checked. [2022-11-20 21:04:46,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:46,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835568018] [2022-11-20 21:04:46,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835568018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:46,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186348564] [2022-11-20 21:04:46,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:04:46,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:46,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:46,204 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:46,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:04:49,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:04:49,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:04:49,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:04:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24920 backedges. 9417 proven. 9422 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2022-11-20 21:04:50,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:51,337 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 25 treesize of output 21 [2022-11-20 21:04:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24920 backedges. 9417 proven. 9422 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2022-11-20 21:04:52,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186348564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409402756] [2022-11-20 21:04:52,416 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:04:52,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:52,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:52,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:52,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:04:52,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:52,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:04:52,459 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 10 treesize of output 9 [2022-11-20 21:04:52,586 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-20 21:04:52,587 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 237 treesize of output 243 [2022-11-20 21:04:52,681 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 15 treesize of output 14 [2022-11-20 21:04:52,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:52,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:52,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:52,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:52,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:04:53,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:04:53,103 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 15 treesize of output 14 [2022-11-20 21:04:53,152 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 15 treesize of output 14 [2022-11-20 21:04:53,179 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:59,428 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9918#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:59,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:59,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:59,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-20 21:04:59,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846467265] [2022-11-20 21:04:59,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:59,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 21:04:59,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:59,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 21:04:59,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:04:59,431 INFO L87 Difference]: Start difference. First operand 506 states and 512 transitions. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:59,757 INFO L93 Difference]: Finished difference Result 628 states and 635 transitions. [2022-11-20 21:04:59,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 21:04:59,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 403 [2022-11-20 21:04:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:59,760 INFO L225 Difference]: With dead ends: 628 [2022-11-20 21:04:59,760 INFO L226 Difference]: Without dead ends: 628 [2022-11-20 21:04:59,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1061 SyntacticMatches, 128 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=218, Invalid=838, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 21:04:59,761 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:59,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 83 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:04:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-20 21:04:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 512. [2022-11-20 21:04:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 509 states have (on average 1.0196463654223968) internal successors, (519), 511 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 519 transitions. [2022-11-20 21:04:59,792 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 519 transitions. Word has length 403 [2022-11-20 21:04:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:59,792 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 519 transitions. [2022-11-20 21:04:59,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 519 transitions. [2022-11-20 21:04:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2022-11-20 21:04:59,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:59,804 INFO L195 NwaCegarLoop]: trace histogram [160, 160, 160, 5, 5, 4, 1, 1] [2022-11-20 21:04:59,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:00,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 21:05:00,016 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:05:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash 143147119, now seen corresponding path program 2 times [2022-11-20 21:05:00,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:05:00,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48790461] [2022-11-20 21:05:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:00,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:05:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2022-11-20 21:05:02,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:05:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48790461] [2022-11-20 21:05:02,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48790461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:05:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535073587] [2022-11-20 21:05:02,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:05:02,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:02,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:05:02,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:05:02,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 21:05:02,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:05:02,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:05:02,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:05:02,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:02,393 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 21:05:02,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:05:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 4 proven. 12552 refuted. 0 times theorem prover too weak. 26434 trivial. 0 not checked. [2022-11-20 21:05:06,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 12556 refuted. 0 times theorem prover too weak. 26434 trivial. 0 not checked. [2022-11-20 21:05:09,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535073587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:09,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726699148] [2022-11-20 21:05:09,377 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 21:05:09,377 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:05:09,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:05:09,378 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:05:09,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:05:09,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:09,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:05:09,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:05:09,527 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 247 treesize of output 249 [2022-11-20 21:05:09,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:05:09,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:05:09,698 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 15 treesize of output 14 [2022-11-20 21:05:09,750 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 15 treesize of output 14 [2022-11-20 21:05:09,807 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 15 treesize of output 14 [2022-11-20 21:05:09,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:05:09,888 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 10 treesize of output 9 [2022-11-20 21:05:09,937 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 15 treesize of output 14 [2022-11-20 21:05:09,988 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 15 treesize of output 14 [2022-11-20 21:05:10,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:05:17,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14063#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (<= 32 |ULTIMATE.start_foo_~size#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= 32 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|)) (<= 0 |ULTIMATE.start_main_~c~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 32) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647) (= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 21:05:17,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:05:17,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:05:17,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2022-11-20 21:05:17,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142344765] [2022-11-20 21:05:17,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:17,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:05:17,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:05:17,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:05:17,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:05:17,249 INFO L87 Difference]: Start difference. First operand 512 states and 519 transitions. Second operand has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:17,683 INFO L93 Difference]: Finished difference Result 617 states and 628 transitions. [2022-11-20 21:05:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:05:17,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 496 [2022-11-20 21:05:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:17,686 INFO L225 Difference]: With dead ends: 617 [2022-11-20 21:05:17,686 INFO L226 Difference]: Without dead ends: 617 [2022-11-20 21:05:17,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1315 SyntacticMatches, 160 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:05:17,687 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:17,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 71 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:05:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-20 21:05:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 604. [2022-11-20 21:05:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.0132669983416251) internal successors, (611), 603 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 611 transitions. [2022-11-20 21:05:17,699 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 611 transitions. Word has length 496 [2022-11-20 21:05:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:17,700 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 611 transitions. [2022-11-20 21:05:17,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 611 transitions. [2022-11-20 21:05:17,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-11-20 21:05:17,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:17,704 INFO L195 NwaCegarLoop]: trace histogram [192, 192, 192, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 21:05:17,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:17,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:17,907 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:05:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1103461215, now seen corresponding path program 1 times [2022-11-20 21:05:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:05:17,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705782854] [2022-11-20 21:05:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:05:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 56214 backedges. 0 proven. 47091 refuted. 0 times theorem prover too weak. 9123 trivial. 0 not checked. [2022-11-20 21:05:19,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:05:19,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705782854] [2022-11-20 21:05:19,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705782854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:05:19,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347949225] [2022-11-20 21:05:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:19,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:19,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:05:19,307 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:05:19,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:05:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:19,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 2394 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 21:05:19,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 56214 backedges. 0 proven. 48560 refuted. 0 times theorem prover too weak. 7654 trivial. 0 not checked. [2022-11-20 21:05:22,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 56214 backedges. 513 proven. 47148 refuted. 0 times theorem prover too weak. 8553 trivial. 0 not checked. [2022-11-20 21:05:23,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347949225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:23,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [286432787] [2022-11-20 21:05:23,939 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-20 21:05:23,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:05:23,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:05:23,940 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:05:23,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:05:23,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:23,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 21:05:23,982 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 10 treesize of output 9 [2022-11-20 21:05:24,073 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-20 21:05:24,073 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 237 treesize of output 243 [2022-11-20 21:05:24,165 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 15 treesize of output 14 [2022-11-20 21:05:24,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:05:24,269 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 10 treesize of output 9 [2022-11-20 21:05:24,308 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 15 treesize of output 14 [2022-11-20 21:05:24,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:05:24,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 21:05:24,502 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 21:05:24,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 14 [2022-11-20 21:05:24,587 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 15 treesize of output 14 [2022-11-20 21:05:24,646 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 15 treesize of output 14 [2022-11-20 21:05:24,690 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 15 treesize of output 14 [2022-11-20 21:05:24,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:05:43,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18965#(and (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_29| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_29|) 0) (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_29|)) (not (= 32 (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_29|) (* |ULTIMATE.start_main_~i~1#1| 4)))) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_29|))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (<= 0 (* |ULTIMATE.start_main_~i~1#1| 4)) (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:05:43,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:05:43,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:05:43,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 34, 15] total 49 [2022-11-20 21:05:43,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956184618] [2022-11-20 21:05:43,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:43,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 21:05:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:05:43,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 21:05:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=2631, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 21:05:43,107 INFO L87 Difference]: Start difference. First operand 604 states and 611 transitions. Second operand has 50 states, 50 states have (on average 3.64) internal successors, (182), 49 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:46,667 INFO L93 Difference]: Finished difference Result 1457 states and 1472 transitions. [2022-11-20 21:05:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 21:05:46,667 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.64) internal successors, (182), 49 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 603 [2022-11-20 21:05:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:46,672 INFO L225 Difference]: With dead ends: 1457 [2022-11-20 21:05:46,672 INFO L226 Difference]: Without dead ends: 1457 [2022-11-20 21:05:46,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1821 GetRequests, 1564 SyntacticMatches, 195 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10068 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=940, Invalid=3092, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 21:05:46,674 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 691 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 4528 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 4687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 4528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:46,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 283 Invalid, 4687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 4528 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 21:05:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-11-20 21:05:46,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1396. [2022-11-20 21:05:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 1.0114695340501791) internal successors, (1411), 1395 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:46,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1411 transitions. [2022-11-20 21:05:46,699 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1411 transitions. Word has length 603 [2022-11-20 21:05:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:46,700 INFO L495 AbstractCegarLoop]: Abstraction has 1396 states and 1411 transitions. [2022-11-20 21:05:46,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.64) internal successors, (182), 49 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1411 transitions. [2022-11-20 21:05:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1396 [2022-11-20 21:05:46,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:46,743 INFO L195 NwaCegarLoop]: trace histogram [448, 448, 448, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 21:05:46,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-20 21:05:46,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:46,952 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 21:05:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1319207585, now seen corresponding path program 2 times [2022-11-20 21:05:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:05:46,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151220467] [2022-11-20 21:05:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:46,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:05:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 306946 backedges. 0 proven. 285663 refuted. 0 times theorem prover too weak. 21283 trivial. 0 not checked. [2022-11-20 21:05:52,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:05:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151220467] [2022-11-20 21:05:52,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151220467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:05:52,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465610717] [2022-11-20 21:05:52,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:05:52,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:52,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:05:52,607 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:05:52,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 21:05:53,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:05:53,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:05:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:05:53,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:02,490 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2575 Int) (v_ArrVal_2574 Int) (v_ArrVal_2576 Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_23| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_30| Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30| v_ArrVal_2576) |v_ULTIMATE.start_main_~#mask~0#1.base_23| v_ArrVal_2575) |v_ULTIMATE.start_main_~#b~0#1.base_30| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_23| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30|) 0) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30| v_ArrVal_2574) |v_ULTIMATE.start_main_~#mask~0#1.base_23|) 0))) is different from true [2022-11-20 21:06:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 306946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 306946 trivial. 0 not checked. [2022-11-20 21:06:02,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:02,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465610717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:02,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:06:02,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [16] total 18 [2022-11-20 21:06:02,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303066663] [2022-11-20 21:06:02,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:02,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:06:02,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:06:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:06:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=260, Unknown=1, NotChecked=32, Total=342 [2022-11-20 21:06:02,517 INFO L87 Difference]: Start difference. First operand 1396 states and 1411 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:02,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:02,525 INFO L93 Difference]: Finished difference Result 1395 states and 1410 transitions. [2022-11-20 21:06:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:06:02,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1395 [2022-11-20 21:06:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:02,529 INFO L225 Difference]: With dead ends: 1395 [2022-11-20 21:06:02,529 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 21:06:02,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1393 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=260, Unknown=1, NotChecked=32, Total=342 [2022-11-20 21:06:02,530 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:02,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-20 21:06:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 21:06:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 21:06:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 21:06:02,532 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1395 [2022-11-20 21:06:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:02,532 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 21:06:02,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 21:06:02,533 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 21:06:02,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2022-11-20 21:06:02,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2022-11-20 21:06:02,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-11-20 21:06:02,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-11-20 21:06:02,536 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-11-20 21:06:02,537 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2022-11-20 21:06:02,537 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2022-11-20 21:06:02,537 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-11-20 21:06:02,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:02,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:02,745 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:02,746 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 21:06:02,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:06:02 BoogieIcfgContainer [2022-11-20 21:06:02,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 21:06:02,750 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 21:06:02,750 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 21:06:02,750 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 21:06:02,751 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:04:06" (3/4) ... [2022-11-20 21:06:02,754 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-20 21:06:02,763 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2022-11-20 21:06:02,763 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-11-20 21:06:02,764 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-20 21:06:02,764 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-20 21:06:02,798 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/bin/utaipan-6cKwYrpEi9/witness.graphml [2022-11-20 21:06:02,802 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 21:06:02,803 INFO L158 Benchmark]: Toolchain (without parser) took 116752.62ms. Allocated memory was 176.2MB in the beginning and 775.9MB in the end (delta: 599.8MB). Free memory was 148.5MB in the beginning and 413.6MB in the end (delta: -265.1MB). Peak memory consumption was 335.6MB. Max. memory is 16.1GB. [2022-11-20 21:06:02,803 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 123.7MB. Free memory was 99.3MB in the beginning and 99.2MB in the end (delta: 132.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:06:02,803 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.12ms. Allocated memory is still 176.2MB. Free memory was 148.4MB in the beginning and 138.4MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 21:06:02,803 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.20ms. Allocated memory is still 176.2MB. Free memory was 138.4MB in the beginning and 137.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:06:02,804 INFO L158 Benchmark]: Boogie Preprocessor took 24.08ms. Allocated memory is still 176.2MB. Free memory was 137.3MB in the beginning and 135.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:06:02,804 INFO L158 Benchmark]: RCFGBuilder took 556.23ms. Allocated memory is still 176.2MB. Free memory was 135.8MB in the beginning and 121.6MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-20 21:06:02,805 INFO L158 Benchmark]: TraceAbstraction took 115780.16ms. Allocated memory was 176.2MB in the beginning and 775.9MB in the end (delta: 599.8MB). Free memory was 120.6MB in the beginning and 416.2MB in the end (delta: -295.6MB). Peak memory consumption was 306.3MB. Max. memory is 16.1GB. [2022-11-20 21:06:02,806 INFO L158 Benchmark]: Witness Printer took 51.95ms. Allocated memory is still 775.9MB. Free memory was 416.2MB in the beginning and 413.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:06:02,807 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 123.7MB. Free memory was 99.3MB in the beginning and 99.2MB in the end (delta: 132.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 285.12ms. Allocated memory is still 176.2MB. Free memory was 148.4MB in the beginning and 138.4MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.20ms. Allocated memory is still 176.2MB. Free memory was 138.4MB in the beginning and 137.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.08ms. Allocated memory is still 176.2MB. Free memory was 137.3MB in the beginning and 135.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 556.23ms. Allocated memory is still 176.2MB. Free memory was 135.8MB in the beginning and 121.6MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 115780.16ms. Allocated memory was 176.2MB in the beginning and 775.9MB in the end (delta: 599.8MB). Free memory was 120.6MB in the beginning and 416.2MB in the end (delta: -295.6MB). Peak memory consumption was 306.3MB. Max. memory is 16.1GB. * Witness Printer took 51.95ms. Allocated memory is still 775.9MB. Free memory was 416.2MB in the beginning and 413.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 115.7s, OverallIterations: 21, TraceHistogramMax: 448, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1656 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1656 mSDsluCounter, 770 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 48 IncrementalHoareTripleChecker+Unchecked, 623 mSDsCounter, 322 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6194 IncrementalHoareTripleChecker+Invalid, 6564 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 322 mSolverCounterUnsat, 147 mSDtfsCounter, 6194 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7649 GetRequests, 6587 SyntacticMatches, 630 SemanticMatches, 432 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 18835 ImplicationChecksByTransitivity, 51.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1396occurred in iteration=20, InterpolantAutomatonStates: 224, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 319 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 5.9s SatisfiabilityAnalysisTime, 43.7s InterpolantComputationTime, 7024 NumberOfCodeBlocks, 4939 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 8962 ConstructedInterpolants, 1507 QuantifiedInterpolants, 123753 SizeOfPredicates, 43 NumberOfNonLiveVariables, 6121 ConjunctsInSsa, 279 ConjunctsInUnsatCore, 48 InterpolantComputations, 9 PerfectInterpolantSequences, 466236/1001873 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: 0.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 4, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.6s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 14, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 28, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 4, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.6s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.6s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, 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: 34, DAG_COMPRESSION_RETAINED_NODES: 20, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-20 21:06:02,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e60039b-5470-41f3-94b5-21e314351ae8/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 Writing output log to file Ultimate.log Result: TRUE