./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- 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-38b53e6 [2022-11-25 22:18:00,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:18:00,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:18:00,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:18:00,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:18:00,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:18:00,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:18:00,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:18:00,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:18:00,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:18:00,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:18:00,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:18:00,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:18:00,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:18:00,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:18:00,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:18:00,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:18:00,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:18:00,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:18:00,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:18:00,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:18:00,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:18:00,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:18:00,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:18:00,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:18:00,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:18:00,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:18:00,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:18:00,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:18:00,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:18:00,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:18:00,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:18:00,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:18:01,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:18:01,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:18:01,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:18:01,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:18:01,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:18:01,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:18:01,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:18:01,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:18:01,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:18:01,060 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:18:01,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:18:01,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:18:01,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:18:01,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:18:01,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:18:01,064 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:18:01,064 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:18:01,064 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:18:01,065 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:18:01,066 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:18:01,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:18:01,067 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:18:01,067 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:18:01,067 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:18:01,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:18:01,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:18:01,068 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:18:01,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:18:01,070 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:18:01,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:18:01,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:18:01,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:18:01,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:18:01,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:18:01,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:18:01,073 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:18:01,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:18:01,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:18:01,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:18:01,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:18:01,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:18:01,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:18:01,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:18:01,076 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:18:01,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:18:01,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:18:01,076 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:18:01,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:18:01,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:18:01,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:18:01,078 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_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2022-11-25 22:18:01,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:18:01,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:18:01,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:18:01,559 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:18:01,560 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:18:01,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-11-25 22:18:04,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:18:05,153 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:18:05,153 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-11-25 22:18:05,162 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/data/f638a2122/16a3c4954960466b9b7f91d010b461ae/FLAG8740a6c9d [2022-11-25 22:18:05,187 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/data/f638a2122/16a3c4954960466b9b7f91d010b461ae [2022-11-25 22:18:05,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:18:05,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:18:05,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:18:05,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:18:05,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:18:05,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693ff79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05, skipping insertion in model container [2022-11-25 22:18:05,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:18:05,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:18:05,440 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2022-11-25 22:18:05,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:18:05,476 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:18:05,494 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2022-11-25 22:18:05,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:18:05,530 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:18:05,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05 WrapperNode [2022-11-25 22:18:05,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:18:05,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:18:05,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:18:05,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:18:05,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,573 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-11-25 22:18:05,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:18:05,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:18:05,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:18:05,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:18:05,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,619 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:18:05,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:18:05,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:18:05,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:18:05,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (1/1) ... [2022-11-25 22:18:05,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:18:05,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:05,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:18:05,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:18:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:18:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:18:05,722 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:18:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:18:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:18:05,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:18:05,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:18:05,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:18:05,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:18:05,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:18:05,810 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:18:05,813 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:18:05,965 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:18:05,998 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:18:05,999 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 22:18:06,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:18:06 BoogieIcfgContainer [2022-11-25 22:18:06,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:18:06,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:18:06,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:18:06,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:18:06,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:18:05" (1/3) ... [2022-11-25 22:18:06,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21903ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:18:06, skipping insertion in model container [2022-11-25 22:18:06,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:18:05" (2/3) ... [2022-11-25 22:18:06,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21903ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:18:06, skipping insertion in model container [2022-11-25 22:18:06,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:18:06" (3/3) ... [2022-11-25 22:18:06,011 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2022-11-25 22:18:06,032 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:18:06,033 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:18:06,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:18:06,094 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@59e2e84d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:18:06,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:18:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:18:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 22:18:06,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:06,107 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:06,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1661147299, now seen corresponding path program 1 times [2022-11-25 22:18:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:06,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882641509] [2022-11-25 22:18:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:18:06,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:06,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882641509] [2022-11-25 22:18:06,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882641509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:06,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:18:06,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:18:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185106074] [2022-11-25 22:18:06,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:06,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:18:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:18:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:18:06,580 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:18:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:06,643 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-11-25 22:18:06,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:18:06,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-11-25 22:18:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:06,653 INFO L225 Difference]: With dead ends: 32 [2022-11-25 22:18:06,653 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 22:18:06,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:18:06,659 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:06,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:18:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 22:18:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2022-11-25 22:18:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:18:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-25 22:18:06,736 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2022-11-25 22:18:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:06,736 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-25 22:18:06,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:18:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-25 22:18:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 22:18:06,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:06,738 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:06,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:18:06,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:06,750 INFO L85 PathProgramCache]: Analyzing trace with hash -279186300, now seen corresponding path program 1 times [2022-11-25 22:18:06,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:06,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447858504] [2022-11-25 22:18:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:06,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:18:07,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:07,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447858504] [2022-11-25 22:18:07,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447858504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:07,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545430946] [2022-11-25 22:18:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:07,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:07,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:07,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:18:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:07,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 22:18:07,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:07,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:18:07,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:18:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:18:07,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:08,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:18:08,091 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 24 treesize of output 20 [2022-11-25 22:18:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:18:08,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545430946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:18:08,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123466419] [2022-11-25 22:18:08,362 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 22:18:08,362 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:08,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:08,373 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:08,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:08,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:08,562 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:08,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:08,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:08,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:18:08,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:08,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:18:09,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:09,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:09,620 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:18:09,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:18:09,801 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 20 treesize of output 17 [2022-11-25 22:18:09,904 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:09,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:11,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '208#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:11,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:11,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:18:11,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 17 [2022-11-25 22:18:11,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51863613] [2022-11-25 22:18:11,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:11,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 22:18:11,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 22:18:11,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:18:11,079 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 22:18:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:11,413 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-25 22:18:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:18:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 18 [2022-11-25 22:18:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:11,421 INFO L225 Difference]: With dead ends: 37 [2022-11-25 22:18:11,422 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 22:18:11,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 22:18:11,430 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:11,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 73 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:18:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 22:18:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2022-11-25 22:18:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:18:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-25 22:18:11,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 18 [2022-11-25 22:18:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:11,438 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-25 22:18:11,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 22:18:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-25 22:18:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 22:18:11,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:11,439 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:11,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:11,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:11,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:11,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:11,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2118100484, now seen corresponding path program 1 times [2022-11-25 22:18:11,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:11,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964653201] [2022-11-25 22:18:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:18:11,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:11,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964653201] [2022-11-25 22:18:11,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964653201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:11,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861542423] [2022-11-25 22:18:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:11,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:11,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:11,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:18:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:11,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:18:11,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:18:11,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:18:11,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861542423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:18:11,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681469807] [2022-11-25 22:18:11,947 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:18:11,948 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:11,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:11,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:11,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:12,041 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:12,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:12,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:18:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:12,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:18:12,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:12,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:12,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:12,739 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:18:12,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:18:12,820 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 20 treesize of output 17 [2022-11-25 22:18:12,949 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:12,950 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:13,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '446#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:13,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:13,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:18:13,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-25 22:18:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879289543] [2022-11-25 22:18:13,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:13,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:18:13,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:18:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-25 22:18:13,886 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:18:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:13,973 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-25 22:18:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:18:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-25 22:18:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:13,979 INFO L225 Difference]: With dead ends: 40 [2022-11-25 22:18:13,979 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 22:18:13,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-11-25 22:18:13,986 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:13,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 44 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:18:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 22:18:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2022-11-25 22:18:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:18:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-25 22:18:14,011 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 21 [2022-11-25 22:18:14,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:14,012 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-25 22:18:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:18:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-25 22:18:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 22:18:14,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:14,015 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:14,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 22:18:14,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:14,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1891214013, now seen corresponding path program 2 times [2022-11-25 22:18:14,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:14,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47190106] [2022-11-25 22:18:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:14,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:18:14,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:14,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47190106] [2022-11-25 22:18:14,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47190106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:14,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837767562] [2022-11-25 22:18:14,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:18:14,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:14,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:14,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:14,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:18:14,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 22:18:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:18:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 22:18:14,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:14,940 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 [2022-11-25 22:18:15,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:18:15,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 22:18:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:18:15,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:15,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837767562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:15,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [767364342] [2022-11-25 22:18:15,342 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 22:18:15,342 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:15,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:15,343 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:15,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:15,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:15,448 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:15,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:15,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:15,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:18:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:15,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:18:16,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:16,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:16,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:16,212 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:18:16,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:18:16,306 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 20 treesize of output 17 [2022-11-25 22:18:16,404 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:16,407 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:17,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '649#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:17,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:17,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:18:17,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2022-11-25 22:18:17,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101420973] [2022-11-25 22:18:17,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:17,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:18:17,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:17,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:18:17,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:18:17,652 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 22:18:20,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:18:22,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:18:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:22,486 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-11-25 22:18:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:18:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 23 [2022-11-25 22:18:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:22,488 INFO L225 Difference]: With dead ends: 54 [2022-11-25 22:18:22,488 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 22:18:22,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=363, Invalid=2087, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 22:18:22,490 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:22,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 68 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 216 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-11-25 22:18:22,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 22:18:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2022-11-25 22:18:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:18:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-25 22:18:22,505 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 23 [2022-11-25 22:18:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:22,506 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-25 22:18:22,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 22:18:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-25 22:18:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 22:18:22,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:22,509 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:22,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:22,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash 229839077, now seen corresponding path program 2 times [2022-11-25 22:18:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:22,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658107537] [2022-11-25 22:18:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:22,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:18:23,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:23,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658107537] [2022-11-25 22:18:23,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658107537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:23,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561788992] [2022-11-25 22:18:23,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:18:23,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:23,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:23,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:18:23,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 22:18:23,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:18:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 22:18:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:23,599 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 15 treesize of output 11 [2022-11-25 22:18:23,836 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 22:18:23,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-11-25 22:18:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:18:23,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:24,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:18:24,024 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 24 treesize of output 20 [2022-11-25 22:18:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:18:24,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561788992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:18:24,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898297857] [2022-11-25 22:18:24,357 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:18:24,357 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:24,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:24,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:24,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:24,431 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:18:24,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:18:24,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:24,479 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:24,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:24,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:18:25,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:25,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:25,224 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:18:25,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:18:25,317 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 20 treesize of output 17 [2022-11-25 22:18:25,477 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:25,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:26,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '990#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:26,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:26,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:18:26,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 27 [2022-11-25 22:18:26,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034061332] [2022-11-25 22:18:26,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:26,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 22:18:26,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:26,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 22:18:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 22:18:26,837 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 21 states have internal predecessors, (38), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-25 22:18:28,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:28,368 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-11-25 22:18:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 22:18:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 21 states have internal predecessors, (38), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 26 [2022-11-25 22:18:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:28,373 INFO L225 Difference]: With dead ends: 60 [2022-11-25 22:18:28,373 INFO L226 Difference]: Without dead ends: 58 [2022-11-25 22:18:28,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=548, Invalid=3112, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 22:18:28,376 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:28,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 126 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:18:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-25 22:18:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2022-11-25 22:18:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:18:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-25 22:18:28,391 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2022-11-25 22:18:28,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:28,392 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-25 22:18:28,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 21 states have internal predecessors, (38), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-25 22:18:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-25 22:18:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 22:18:28,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:28,394 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:28,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:28,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:28,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:28,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1882961244, now seen corresponding path program 3 times [2022-11-25 22:18:28,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:28,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136265269] [2022-11-25 22:18:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:28,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:18:29,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136265269] [2022-11-25 22:18:29,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136265269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266649184] [2022-11-25 22:18:29,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:18:29,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:29,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:29,228 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:29,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:18:29,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:18:29,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:18:29,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 22:18:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:29,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:18:29,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:18:29,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:18:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:18:29,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:29,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:18:29,820 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 31 treesize of output 27 [2022-11-25 22:18:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:18:29,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266649184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:18:29,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2015417101] [2022-11-25 22:18:29,964 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:18:29,965 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:29,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:29,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:29,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:30,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:30,065 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:18:30,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:18:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:30,121 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:30,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:30,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:30,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:18:30,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:30,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:30,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:30,880 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:18:30,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:18:30,964 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 20 treesize of output 17 [2022-11-25 22:18:31,105 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:31,106 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:32,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1392#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:32,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:32,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:18:32,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 24 [2022-11-25 22:18:32,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414623448] [2022-11-25 22:18:32,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:32,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 22:18:32,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 22:18:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 22:18:32,269 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-25 22:18:34,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:18:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:35,044 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-11-25 22:18:35,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 22:18:35,044 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2022-11-25 22:18:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:35,045 INFO L225 Difference]: With dead ends: 84 [2022-11-25 22:18:35,046 INFO L226 Difference]: Without dead ends: 82 [2022-11-25 22:18:35,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=344, Invalid=2206, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 22:18:35,047 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 145 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:35,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 185 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 392 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 22:18:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-25 22:18:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 45. [2022-11-25 22:18:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:18:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-11-25 22:18:35,061 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 31 [2022-11-25 22:18:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:35,061 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-11-25 22:18:35,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-25 22:18:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-11-25 22:18:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 22:18:35,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:35,063 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:35,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:35,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:35,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:35,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1379162595, now seen corresponding path program 3 times [2022-11-25 22:18:35,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:35,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797620757] [2022-11-25 22:18:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:35,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:18:35,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:35,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797620757] [2022-11-25 22:18:35,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797620757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:35,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449896784] [2022-11-25 22:18:35,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:18:35,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:35,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:35,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:18:35,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:18:35,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:18:35,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 22:18:35,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:36,002 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 [2022-11-25 22:18:36,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-25 22:18:36,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-25 22:18:36,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:18:36,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:18:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:18:36,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:38,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449896784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:38,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256809391] [2022-11-25 22:18:38,567 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 22:18:38,567 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:38,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:38,568 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:38,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:38,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:38,645 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:18:38,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:18:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:38,690 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:38,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:38,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:38,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:18:39,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:39,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:39,303 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:18:39,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:18:39,372 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 20 treesize of output 17 [2022-11-25 22:18:39,452 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:39,453 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:40,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1771#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:40,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:40,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:18:40,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2022-11-25 22:18:40,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128295641] [2022-11-25 22:18:40,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:40,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 22:18:40,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 22:18:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1235, Unknown=1, NotChecked=0, Total=1406 [2022-11-25 22:18:40,498 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 24 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 10 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-25 22:18:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:40,973 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-11-25 22:18:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:18:40,974 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 10 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 33 [2022-11-25 22:18:40,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:40,975 INFO L225 Difference]: With dead ends: 72 [2022-11-25 22:18:40,975 INFO L226 Difference]: Without dead ends: 70 [2022-11-25 22:18:40,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=329, Invalid=2022, Unknown=1, NotChecked=0, Total=2352 [2022-11-25 22:18:40,976 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 150 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:40,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 130 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:18:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-25 22:18:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2022-11-25 22:18:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:18:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-25 22:18:40,990 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 33 [2022-11-25 22:18:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:40,991 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-25 22:18:40,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 10 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-25 22:18:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-25 22:18:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 22:18:40,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:40,993 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:41,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:41,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:41,199 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:41,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:41,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1274944484, now seen corresponding path program 4 times [2022-11-25 22:18:41,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:41,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968367492] [2022-11-25 22:18:41,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:41,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:18:41,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:41,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968367492] [2022-11-25 22:18:41,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968367492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:41,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783705237] [2022-11-25 22:18:41,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:18:41,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:41,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:41,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:18:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:41,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 22:18:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:42,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:18:42,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:18:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:18:42,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:42,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:18:42,241 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 24 treesize of output 20 [2022-11-25 22:18:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:18:42,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783705237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:18:42,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579191083] [2022-11-25 22:18:42,455 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:18:42,455 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:42,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:42,456 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:42,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:42,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:42,526 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:18:42,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:18:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:42,571 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:42,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:42,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:42,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:18:43,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:43,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:43,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:43,149 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:18:43,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:18:43,217 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 20 treesize of output 17 [2022-11-25 22:18:43,363 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:43,365 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:44,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2200#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:44,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:44,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:18:44,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 29 [2022-11-25 22:18:44,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812798149] [2022-11-25 22:18:44,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:44,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 22:18:44,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:44,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 22:18:44,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 22:18:44,581 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 29 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 23 states have internal predecessors, (46), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-25 22:18:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:45,540 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-11-25 22:18:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:18:45,541 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 23 states have internal predecessors, (46), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 34 [2022-11-25 22:18:45,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:45,544 INFO L225 Difference]: With dead ends: 80 [2022-11-25 22:18:45,544 INFO L226 Difference]: Without dead ends: 78 [2022-11-25 22:18:45,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=360, Invalid=2502, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 22:18:45,548 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 87 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:45,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 253 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:18:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-25 22:18:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2022-11-25 22:18:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:18:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-25 22:18:45,577 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 34 [2022-11-25 22:18:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:45,578 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-25 22:18:45,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 23 states have internal predecessors, (46), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-25 22:18:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-25 22:18:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 22:18:45,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:45,583 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:45,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:45,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:45,790 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1751034173, now seen corresponding path program 5 times [2022-11-25 22:18:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:45,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832028392] [2022-11-25 22:18:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:45,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:18:45,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:45,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832028392] [2022-11-25 22:18:45,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832028392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:45,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135251413] [2022-11-25 22:18:45,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:18:45,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:45,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:45,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:46,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:18:46,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:18:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:18:46,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 22:18:46,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:18:46,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:18:46,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135251413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:18:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730100692] [2022-11-25 22:18:46,388 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:18:46,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:46,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:46,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:46,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:46,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:46,460 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:46,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:46,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:46,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:18:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:46,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:18:47,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:47,115 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:18:47,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:18:47,248 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 20 treesize of output 17 [2022-11-25 22:18:47,385 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:47,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:48,563 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2642#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:48,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:48,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:18:48,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-25 22:18:48,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375615712] [2022-11-25 22:18:48,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:48,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 22:18:48,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 22:18:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 22:18:48,566 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-25 22:18:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:48,928 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2022-11-25 22:18:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:18:48,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 35 [2022-11-25 22:18:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:48,930 INFO L225 Difference]: With dead ends: 102 [2022-11-25 22:18:48,930 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 22:18:48,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=295, Invalid=1597, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 22:18:48,932 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:48,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 118 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:18:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 22:18:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2022-11-25 22:18:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:18:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-11-25 22:18:48,952 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 35 [2022-11-25 22:18:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:48,952 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-11-25 22:18:48,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-25 22:18:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-11-25 22:18:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:18:48,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:48,954 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:48,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 22:18:49,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 22:18:49,162 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:49,163 INFO L85 PathProgramCache]: Analyzing trace with hash 148186787, now seen corresponding path program 6 times [2022-11-25 22:18:49,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:49,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364145489] [2022-11-25 22:18:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:49,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:18:49,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:49,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364145489] [2022-11-25 22:18:49,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364145489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:49,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360869748] [2022-11-25 22:18:49,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:18:49,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:49,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:49,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:49,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:18:49,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:18:49,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:18:49,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 22:18:49,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:50,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:18:50,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:18:50,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:18:50,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:18:50,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-11-25 22:18:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:18:50,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:50,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360869748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:50,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982015141] [2022-11-25 22:18:50,485 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:18:50,485 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:50,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:50,485 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:50,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:50,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:50,579 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:50,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:50,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:18:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:50,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:18:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:51,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:51,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:51,208 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:18:51,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:18:51,341 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 20 treesize of output 17 [2022-11-25 22:18:51,469 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:51,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:52,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3065#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:52,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:52,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:18:52,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2022-11-25 22:18:52,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648510745] [2022-11-25 22:18:52,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:52,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 22:18:52,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 22:18:52,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 22:18:52,865 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-25 22:18:54,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:18:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:55,830 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2022-11-25 22:18:55,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 22:18:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 39 [2022-11-25 22:18:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:55,832 INFO L225 Difference]: With dead ends: 95 [2022-11-25 22:18:55,832 INFO L226 Difference]: Without dead ends: 93 [2022-11-25 22:18:55,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=432, Invalid=2990, Unknown=0, NotChecked=0, Total=3422 [2022-11-25 22:18:55,834 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 168 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:55,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 152 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 372 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 22:18:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-25 22:18:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2022-11-25 22:18:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 22:18:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-11-25 22:18:55,859 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 39 [2022-11-25 22:18:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:55,860 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-11-25 22:18:55,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-25 22:18:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-11-25 22:18:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 22:18:55,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:55,862 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:55,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:56,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:18:56,075 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:56,076 INFO L85 PathProgramCache]: Analyzing trace with hash 498837316, now seen corresponding path program 7 times [2022-11-25 22:18:56,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:56,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943342000] [2022-11-25 22:18:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:56,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:18:56,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:56,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943342000] [2022-11-25 22:18:56,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943342000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:56,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786861162] [2022-11-25 22:18:56,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:18:56,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:56,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:56,753 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:56,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:18:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:56,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 22:18:56,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:57,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:18:57,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:57,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:18:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:57,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:18:57,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:57,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:18:57,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:18:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:18:57,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:57,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:18:57,771 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 28 treesize of output 24 [2022-11-25 22:18:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-25 22:18:57,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786861162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:18:57,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101184561] [2022-11-25 22:18:57,907 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:18:57,907 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:57,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:57,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:57,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:57,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:57,978 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:18:57,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:18:57,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:57,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:18:58,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:58,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:18:58,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:58,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:58,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:58,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:58,601 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:18:58,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:18:58,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-25 22:18:58,880 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:18:58,882 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:19:00,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3603#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:19:00,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:19:00,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:19:00,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 28 [2022-11-25 22:19:00,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706022968] [2022-11-25 22:19:00,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:19:00,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 22:19:00,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:00,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 22:19:00,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 22:19:00,196 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-25 22:19:02,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:19:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:02,843 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-11-25 22:19:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 22:19:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 41 [2022-11-25 22:19:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:02,845 INFO L225 Difference]: With dead ends: 79 [2022-11-25 22:19:02,845 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 22:19:02,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 22:19:02,847 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:02,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 186 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 529 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 22:19:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 22:19:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2022-11-25 22:19:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 22:19:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-11-25 22:19:02,866 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 41 [2022-11-25 22:19:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:02,867 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-11-25 22:19:02,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-25 22:19:02,867 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-11-25 22:19:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 22:19:02,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:02,868 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:02,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 22:19:03,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:03,074 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:03,074 INFO L85 PathProgramCache]: Analyzing trace with hash -588297339, now seen corresponding path program 8 times [2022-11-25 22:19:03,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:03,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374733123] [2022-11-25 22:19:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:03,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:19:03,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374733123] [2022-11-25 22:19:03,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374733123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335968224] [2022-11-25 22:19:03,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:19:03,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:03,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:03,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:03,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:19:03,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 22:19:03,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:19:03,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 22:19:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:03,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:19:04,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 22:19:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:19:04,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:04,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:19:04,357 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 24 treesize of output 20 [2022-11-25 22:19:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:19:04,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335968224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634137382] [2022-11-25 22:19:04,655 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:19:04,655 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:19:04,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:19:04,655 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:19:04,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:19:04,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:04,732 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:19:04,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:19:04,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:04,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:19:04,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:04,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:19:05,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:05,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:05,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:05,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:05,347 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:19:05,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:19:05,464 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 20 treesize of output 17 [2022-11-25 22:19:05,572 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:19:05,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:19:07,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4126#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:19:07,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:19:07,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:19:07,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-11-25 22:19:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454360196] [2022-11-25 22:19:07,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:19:07,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 22:19:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 22:19:07,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 22:19:07,078 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 37 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 32 states have internal predecessors, (67), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 22:19:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:07,807 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-11-25 22:19:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:19:07,808 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 32 states have internal predecessors, (67), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 42 [2022-11-25 22:19:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:07,810 INFO L225 Difference]: With dead ends: 79 [2022-11-25 22:19:07,810 INFO L226 Difference]: Without dead ends: 66 [2022-11-25 22:19:07,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=475, Invalid=3431, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 22:19:07,812 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:07,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 233 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:19:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-25 22:19:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2022-11-25 22:19:07,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 22:19:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-11-25 22:19:07,830 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 42 [2022-11-25 22:19:07,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:07,830 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-11-25 22:19:07,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 32 states have internal predecessors, (67), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 22:19:07,831 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-11-25 22:19:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 22:19:07,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:07,838 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:07,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:19:08,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:08,045 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash 506144580, now seen corresponding path program 9 times [2022-11-25 22:19:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:08,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043322687] [2022-11-25 22:19:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:19:08,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:08,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043322687] [2022-11-25 22:19:08,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043322687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:08,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795212718] [2022-11-25 22:19:08,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:19:08,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:08,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:08,660 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:08,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:19:08,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:19:08,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:19:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 22:19:08,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:09,038 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 [2022-11-25 22:19:09,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:19:09,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:19:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 17 proven. 53 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:19:09,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:09,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:19:09,583 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 31 treesize of output 27 [2022-11-25 22:19:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:19:09,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795212718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923955297] [2022-11-25 22:19:09,786 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:19:09,786 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:19:09,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:19:09,787 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:19:09,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:19:09,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:09,860 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:19:09,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:19:09,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:09,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:19:10,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:10,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:19:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:10,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:10,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:10,412 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:19:10,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:19:10,537 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 20 treesize of output 17 [2022-11-25 22:19:10,637 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:19:10,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:19:11,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4666#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:19:11,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:19:11,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:19:11,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 35 [2022-11-25 22:19:11,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811027473] [2022-11-25 22:19:11,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:19:11,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 22:19:11,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 22:19:11,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 22:19:11,876 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 35 states, 31 states have (on average 1.903225806451613) internal successors, (59), 29 states have internal predecessors, (59), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-11-25 22:19:13,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:19:16,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:19:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:17,241 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2022-11-25 22:19:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 22:19:17,242 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 1.903225806451613) internal successors, (59), 29 states have internal predecessors, (59), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 47 [2022-11-25 22:19:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:17,243 INFO L225 Difference]: With dead ends: 103 [2022-11-25 22:19:17,243 INFO L226 Difference]: Without dead ends: 101 [2022-11-25 22:19:17,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=484, Invalid=3938, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 22:19:17,246 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 43 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:17,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 338 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 787 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-25 22:19:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-25 22:19:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2022-11-25 22:19:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 22:19:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-11-25 22:19:17,273 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 47 [2022-11-25 22:19:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:17,274 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-11-25 22:19:17,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 1.903225806451613) internal successors, (59), 29 states have internal predecessors, (59), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-11-25 22:19:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-11-25 22:19:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 22:19:17,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:17,276 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:17,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 22:19:17,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 22:19:17,484 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash -227155133, now seen corresponding path program 10 times [2022-11-25 22:19:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:17,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105217842] [2022-11-25 22:19:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:17,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 22:19:18,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:18,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105217842] [2022-11-25 22:19:18,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105217842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:18,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15578099] [2022-11-25 22:19:18,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:19:18,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:18,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:18,558 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:18,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:19:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 22:19:18,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:18,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:19:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:18,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:19:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:19,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:19:19,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:19,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:19:19,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:19:19,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:19:19,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-11-25 22:19:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:19:19,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:19,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15578099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:19,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [466458531] [2022-11-25 22:19:19,451 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:19:19,451 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:19:19,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:19:19,452 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:19:19,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:19:19,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:19,533 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:19:19,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:19:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:19,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:19:19,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:19,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:19:20,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:20,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:20,174 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:19:20,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:19:20,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-25 22:19:20,340 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:19:20,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:19:21,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5166#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:19:21,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:19:21,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:19:21,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2022-11-25 22:19:21,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92363706] [2022-11-25 22:19:21,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:19:21,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 22:19:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:21,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 22:19:21,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 22:19:21,729 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 22 states have internal predecessors, (41), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 13 states have call predecessors, (15), 12 states have call successors, (15) [2022-11-25 22:19:23,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:19:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:24,619 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-11-25 22:19:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 22:19:24,620 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 22 states have internal predecessors, (41), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 13 states have call predecessors, (15), 12 states have call successors, (15) Word has length 49 [2022-11-25 22:19:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:24,621 INFO L225 Difference]: With dead ends: 84 [2022-11-25 22:19:24,621 INFO L226 Difference]: Without dead ends: 82 [2022-11-25 22:19:24,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=400, Invalid=2792, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 22:19:24,623 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:24,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 156 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 442 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 22:19:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-25 22:19:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2022-11-25 22:19:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 22:19:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-11-25 22:19:24,647 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 49 [2022-11-25 22:19:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:24,648 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-11-25 22:19:24,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 22 states have internal predecessors, (41), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 13 states have call predecessors, (15), 12 states have call successors, (15) [2022-11-25 22:19:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-11-25 22:19:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 22:19:24,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:24,650 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:24,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 22:19:24,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 22:19:24,857 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:24,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1071482044, now seen corresponding path program 11 times [2022-11-25 22:19:24,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:24,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591912027] [2022-11-25 22:19:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:24,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:19:25,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591912027] [2022-11-25 22:19:25,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591912027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066333803] [2022-11-25 22:19:25,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:19:25,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:25,627 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:25,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:19:25,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 22:19:25,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:19:25,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 22:19:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:26,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:19:26,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 22:19:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:19:26,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:26,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:19:26,771 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 24 treesize of output 20 [2022-11-25 22:19:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:19:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066333803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086582094] [2022-11-25 22:19:27,163 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:19:27,164 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:19:27,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:19:27,164 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:19:27,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:19:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:27,237 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:19:27,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:19:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:27,286 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:19:27,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:19:27,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:27,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:19:27,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:27,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:27,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:27,977 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:19:27,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:19:28,055 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 20 treesize of output 17 [2022-11-25 22:19:28,175 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:19:28,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:19:29,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5749#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:19:29,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:19:29,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:19:29,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-11-25 22:19:29,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007296418] [2022-11-25 22:19:29,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:19:29,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 22:19:29,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 22:19:29,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2976, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 22:19:29,823 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 46 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 41 states have internal predecessors, (82), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-25 22:19:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:32,043 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2022-11-25 22:19:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 22:19:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 41 states have internal predecessors, (82), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 50 [2022-11-25 22:19:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:32,046 INFO L225 Difference]: With dead ends: 112 [2022-11-25 22:19:32,047 INFO L226 Difference]: Without dead ends: 110 [2022-11-25 22:19:32,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2623 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=950, Invalid=7422, Unknown=0, NotChecked=0, Total=8372 [2022-11-25 22:19:32,050 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 280 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:32,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 262 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:19:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-25 22:19:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2022-11-25 22:19:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 22:19:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2022-11-25 22:19:32,092 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 50 [2022-11-25 22:19:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:32,092 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2022-11-25 22:19:32,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 41 states have internal predecessors, (82), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-25 22:19:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2022-11-25 22:19:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 22:19:32,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:32,094 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:32,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 22:19:32,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:32,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:32,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1067309053, now seen corresponding path program 12 times [2022-11-25 22:19:32,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:32,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217068564] [2022-11-25 22:19:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 22:19:33,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:33,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217068564] [2022-11-25 22:19:33,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217068564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:33,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323041379] [2022-11-25 22:19:33,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:19:33,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:33,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:33,096 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:33,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 22:19:33,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:19:33,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:19:33,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 22:19:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:33,693 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 13 treesize of output 9 [2022-11-25 22:19:33,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:19:34,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:19:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:19:34,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:34,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:19:34,499 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 31 treesize of output 27 [2022-11-25 22:19:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 22:19:34,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323041379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:34,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251784883] [2022-11-25 22:19:34,716 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:19:34,717 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:19:34,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:19:34,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:19:34,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:19:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:34,810 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:19:34,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:19:34,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:34,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:19:34,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:34,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:19:35,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:35,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:35,384 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:19:35,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:19:35,471 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 20 treesize of output 17 [2022-11-25 22:19:35,588 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:19:35,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:19:37,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6455#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:19:37,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:19:37,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:19:37,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 19] total 38 [2022-11-25 22:19:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868134210] [2022-11-25 22:19:37,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:19:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 22:19:37,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 22:19:37,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2227, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 22:19:37,211 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 38 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 34 states have internal predecessors, (69), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-25 22:19:39,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:19:42,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:19:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:43,025 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-11-25 22:19:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 22:19:43,026 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 34 states have internal predecessors, (69), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) Word has length 55 [2022-11-25 22:19:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:43,027 INFO L225 Difference]: With dead ends: 146 [2022-11-25 22:19:43,027 INFO L226 Difference]: Without dead ends: 144 [2022-11-25 22:19:43,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=697, Invalid=6109, Unknown=0, NotChecked=0, Total=6806 [2022-11-25 22:19:43,030 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 194 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:43,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 331 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 876 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-25 22:19:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-25 22:19:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 92. [2022-11-25 22:19:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 73 states have internal predecessors, (78), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 22:19:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-11-25 22:19:43,072 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 55 [2022-11-25 22:19:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:43,073 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-11-25 22:19:43,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 34 states have internal predecessors, (69), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-25 22:19:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-11-25 22:19:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 22:19:43,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:43,074 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:43,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 22:19:43,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 22:19:43,279 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:43,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:43,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1410679780, now seen corresponding path program 13 times [2022-11-25 22:19:43,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:43,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593404063] [2022-11-25 22:19:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:43,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 8 proven. 91 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:19:44,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:44,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593404063] [2022-11-25 22:19:44,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593404063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:44,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786196293] [2022-11-25 22:19:44,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:19:44,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:44,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:44,051 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:44,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 22:19:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 22:19:44,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:44,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:19:44,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:44,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:19:44,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:44,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:19:44,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:44,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:19:45,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:19:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 44 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 22:19:45,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:45,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:19:45,330 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 28 treesize of output 24 [2022-11-25 22:19:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 5 proven. 91 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-25 22:19:45,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786196293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:45,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780309256] [2022-11-25 22:19:45,483 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:19:45,483 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:19:45,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:19:45,484 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:19:45,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:19:45,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:45,550 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:19:45,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:19:45,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:45,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:19:45,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:45,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:19:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:46,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:46,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:46,060 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:19:46,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:19:46,127 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 20 treesize of output 17 [2022-11-25 22:19:46,213 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:19:46,216 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:19:47,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7242#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:19:47,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:19:47,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:19:47,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 17] total 36 [2022-11-25 22:19:47,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125171528] [2022-11-25 22:19:47,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:19:47,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 22:19:47,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:47,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 22:19:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 22:19:47,491 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-11-25 22:19:48,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:48,497 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2022-11-25 22:19:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 22:19:48,498 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 57 [2022-11-25 22:19:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:48,499 INFO L225 Difference]: With dead ends: 130 [2022-11-25 22:19:48,499 INFO L226 Difference]: Without dead ends: 128 [2022-11-25 22:19:48,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 130 SyntacticMatches, 12 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 22:19:48,501 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:48,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 299 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:19:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-25 22:19:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 81. [2022-11-25 22:19:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 62 states have internal predecessors, (66), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 22:19:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-11-25 22:19:48,531 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 57 [2022-11-25 22:19:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:48,531 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-11-25 22:19:48,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-11-25 22:19:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-11-25 22:19:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 22:19:48,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:48,533 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:48,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 22:19:48,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 22:19:48,734 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash -555594203, now seen corresponding path program 14 times [2022-11-25 22:19:48,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:48,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742536935] [2022-11-25 22:19:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:48,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 22:19:49,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:49,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742536935] [2022-11-25 22:19:49,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742536935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:49,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8547618] [2022-11-25 22:19:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:19:49,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:49,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:49,530 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:49,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 22:19:49,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-25 22:19:49,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:19:49,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 22:19:49,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:50,229 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 15 treesize of output 11 [2022-11-25 22:19:50,800 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 22:19:50,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-25 22:19:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 40 proven. 63 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 22:19:50,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:51,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:19:51,589 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 34 treesize of output 28 [2022-11-25 22:19:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 35 proven. 68 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 22:19:52,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8547618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:52,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987381091] [2022-11-25 22:19:52,182 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:19:52,182 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:19:52,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:19:52,183 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:19:52,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:19:52,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:52,257 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:19:52,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:19:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:52,312 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:19:52,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:19:52,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:52,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:19:52,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:52,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:52,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:52,877 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:19:52,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:19:52,978 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 20 treesize of output 17 [2022-11-25 22:19:53,081 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:19:53,082 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:19:54,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7983#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:19:54,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:19:54,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:19:54,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 51 [2022-11-25 22:19:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556739064] [2022-11-25 22:19:54,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:19:54,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 22:19:54,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:54,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 22:19:54,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=3545, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 22:19:54,606 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 46 states have internal predecessors, (97), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-11-25 22:20:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:00,349 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-11-25 22:20:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 22:20:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.94) internal successors, (97), 46 states have internal predecessors, (97), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 58 [2022-11-25 22:20:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:00,351 INFO L225 Difference]: With dead ends: 138 [2022-11-25 22:20:00,351 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 22:20:00,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3963 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1666, Invalid=12614, Unknown=0, NotChecked=0, Total=14280 [2022-11-25 22:20:00,354 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 317 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:00,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 307 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 22:20:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 22:20:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2022-11-25 22:20:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 22:20:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2022-11-25 22:20:00,382 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 58 [2022-11-25 22:20:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:00,383 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2022-11-25 22:20:00,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.94) internal successors, (97), 46 states have internal predecessors, (97), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-11-25 22:20:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2022-11-25 22:20:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 22:20:00,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:00,385 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:00,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:00,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 22:20:00,592 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash -909849628, now seen corresponding path program 15 times [2022-11-25 22:20:00,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:00,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117514081] [2022-11-25 22:20:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:00,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 7 proven. 117 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:20:01,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:01,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117514081] [2022-11-25 22:20:01,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117514081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:01,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206098055] [2022-11-25 22:20:01,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:20:01,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:01,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:01,490 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:01,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 22:20:01,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:20:01,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:20:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 22:20:01,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:02,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:20:02,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:20:02,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:20:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-25 22:20:02,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:02,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:20:02,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-25 22:20:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 7 proven. 117 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:20:03,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206098055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056721158] [2022-11-25 22:20:03,179 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:20:03,179 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:03,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:03,180 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:03,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:03,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:03,274 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:20:03,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:20:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:03,329 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:20:03,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:20:03,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:03,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:20:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:03,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:03,926 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:20:03,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:20:04,002 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 20 treesize of output 17 [2022-11-25 22:20:04,108 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:20:04,109 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:20:05,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8818#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:20:05,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:20:05,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:20:05,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 20] total 42 [2022-11-25 22:20:05,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126490103] [2022-11-25 22:20:05,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:20:05,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 22:20:05,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:05,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 22:20:05,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2626, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 22:20:05,630 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 42 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-25 22:20:07,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:10,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:11,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:11,288 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2022-11-25 22:20:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 22:20:11,290 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) Word has length 63 [2022-11-25 22:20:11,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:11,291 INFO L225 Difference]: With dead ends: 131 [2022-11-25 22:20:11,292 INFO L226 Difference]: Without dead ends: 129 [2022-11-25 22:20:11,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=612, Invalid=5868, Unknown=0, NotChecked=0, Total=6480 [2022-11-25 22:20:11,294 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 285 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:11,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 418 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1078 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-25 22:20:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-25 22:20:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 85. [2022-11-25 22:20:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 22:20:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-11-25 22:20:11,337 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 63 [2022-11-25 22:20:11,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:11,338 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-11-25 22:20:11,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-25 22:20:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-11-25 22:20:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 22:20:11,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:11,339 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:11,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:11,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:11,541 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:11,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1825200989, now seen corresponding path program 16 times [2022-11-25 22:20:11,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:11,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053950040] [2022-11-25 22:20:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:11,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:20:12,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:12,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053950040] [2022-11-25 22:20:12,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053950040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:12,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611227296] [2022-11-25 22:20:12,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:20:12,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:12,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:12,454 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:12,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 22:20:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 22:20:12,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:12,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:20:13,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:13,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:20:13,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:13,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:20:13,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:13,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:20:13,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:20:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 51 proven. 119 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 22:20:13,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:13,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611227296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:13,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72851459] [2022-11-25 22:20:13,765 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:20:13,765 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:13,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:13,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:13,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:13,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:13,840 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:20:13,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:20:13,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:13,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:20:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:13,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:20:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:14,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:14,342 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:20:14,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:20:14,408 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 20 treesize of output 17 [2022-11-25 22:20:14,491 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:20:14,493 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:20:15,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9482#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:20:15,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:20:15,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:20:15,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 40 [2022-11-25 22:20:15,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109344287] [2022-11-25 22:20:15,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:20:15,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 22:20:15,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 22:20:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2710, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 22:20:15,820 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 40 states, 38 states have (on average 1.868421052631579) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-25 22:20:17,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:20,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:22,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:23,361 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-11-25 22:20:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 22:20:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.868421052631579) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 65 [2022-11-25 22:20:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:23,363 INFO L225 Difference]: With dead ends: 112 [2022-11-25 22:20:23,364 INFO L226 Difference]: Without dead ends: 110 [2022-11-25 22:20:23,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=567, Invalid=4983, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 22:20:23,365 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 40 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:23,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 330 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 975 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-11-25 22:20:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-25 22:20:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 71. [2022-11-25 22:20:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 22:20:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-11-25 22:20:23,404 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 65 [2022-11-25 22:20:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:23,404 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-11-25 22:20:23,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.868421052631579) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-25 22:20:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-11-25 22:20:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-25 22:20:23,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:23,406 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:23,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:23,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:23,619 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash 213848740, now seen corresponding path program 17 times [2022-11-25 22:20:23,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:23,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336293688] [2022-11-25 22:20:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:23,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 8 proven. 133 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:20:24,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:24,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336293688] [2022-11-25 22:20:24,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336293688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:24,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941829917] [2022-11-25 22:20:24,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:20:24,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:24,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:24,479 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:24,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 22:20:24,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 22:20:24,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:20:24,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 22:20:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:25,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:20:26,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 22:20:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 8 proven. 133 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:20:26,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:26,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:20:26,577 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 24 treesize of output 20 [2022-11-25 22:20:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 8 proven. 133 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:20:27,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941829917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:27,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635115934] [2022-11-25 22:20:27,252 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:20:27,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:27,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:27,254 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:27,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:27,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:27,348 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:20:27,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:20:27,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:27,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:20:27,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:27,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:20:27,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:27,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:27,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:27,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:27,990 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:20:27,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:20:28,120 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 20 treesize of output 17 [2022-11-25 22:20:28,241 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:20:28,242 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:20:29,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10248#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:20:29,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:20:29,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:20:29,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2022-11-25 22:20:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544960211] [2022-11-25 22:20:29,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:20:29,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-25 22:20:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-25 22:20:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=4245, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 22:20:29,995 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 52 states have internal predecessors, (112), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-25 22:20:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:33,585 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2022-11-25 22:20:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 22:20:33,586 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.0) internal successors, (112), 52 states have internal predecessors, (112), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) Word has length 66 [2022-11-25 22:20:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:33,587 INFO L225 Difference]: With dead ends: 146 [2022-11-25 22:20:33,587 INFO L226 Difference]: Without dead ends: 144 [2022-11-25 22:20:33,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1405, Invalid=11705, Unknown=0, NotChecked=0, Total=13110 [2022-11-25 22:20:33,606 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 287 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:33,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 491 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:20:33,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-25 22:20:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 95. [2022-11-25 22:20:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 22:20:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2022-11-25 22:20:33,677 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 66 [2022-11-25 22:20:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:33,677 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2022-11-25 22:20:33,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.0) internal successors, (112), 52 states have internal predecessors, (112), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-25 22:20:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2022-11-25 22:20:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 22:20:33,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:33,679 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:33,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:33,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:33,879 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash -18652829, now seen corresponding path program 18 times [2022-11-25 22:20:33,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:33,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264036030] [2022-11-25 22:20:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:33,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 8 proven. 157 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:20:34,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:34,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264036030] [2022-11-25 22:20:34,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264036030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:34,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711453956] [2022-11-25 22:20:34,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:20:34,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:34,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:34,992 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:35,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 22:20:35,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:20:35,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:20:35,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 22:20:35,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:35,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:20:36,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:20:36,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:20:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 24 proven. 157 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-25 22:20:36,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:36,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:20:36,918 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 31 treesize of output 27 [2022-11-25 22:20:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 8 proven. 157 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:20:37,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711453956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:37,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744013429] [2022-11-25 22:20:37,219 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:20:37,219 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:37,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:37,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:37,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:37,303 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:20:37,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:20:37,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:37,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:20:37,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:37,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:20:37,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:37,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:37,820 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:20:37,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:20:37,892 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 20 treesize of output 17 [2022-11-25 22:20:38,000 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:20:38,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:20:39,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11164#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:20:39,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:20:39,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:20:39,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 23] total 48 [2022-11-25 22:20:39,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138088761] [2022-11-25 22:20:39,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:20:39,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 22:20:39,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 22:20:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 22:20:39,704 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-25 22:20:41,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:43,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:47,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:48,142 INFO L93 Difference]: Finished difference Result 186 states and 193 transitions. [2022-11-25 22:20:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 22:20:48,146 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) Word has length 71 [2022-11-25 22:20:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:48,147 INFO L225 Difference]: With dead ends: 186 [2022-11-25 22:20:48,147 INFO L226 Difference]: Without dead ends: 184 [2022-11-25 22:20:48,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2876 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=838, Invalid=8864, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 22:20:48,149 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 323 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 78 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:48,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 526 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1532 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2022-11-25 22:20:48,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-25 22:20:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2022-11-25 22:20:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 96 states have (on average 1.0625) internal successors, (102), 97 states have internal predecessors, (102), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 22:20:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2022-11-25 22:20:48,223 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 71 [2022-11-25 22:20:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:48,224 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2022-11-25 22:20:48,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-25 22:20:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2022-11-25 22:20:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 22:20:48,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:48,225 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:48,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:48,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:48,431 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:48,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:48,432 INFO L85 PathProgramCache]: Analyzing trace with hash -366892924, now seen corresponding path program 19 times [2022-11-25 22:20:48,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:48,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066058723] [2022-11-25 22:20:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 10 proven. 165 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 22:20:49,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:49,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066058723] [2022-11-25 22:20:49,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066058723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:49,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749127052] [2022-11-25 22:20:49,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:20:49,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:49,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:49,339 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:49,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 22:20:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:49,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-25 22:20:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:49,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:20:50,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:50,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:20:50,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:50,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:20:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:50,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:20:50,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:20:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 58 proven. 159 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-25 22:20:50,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:51,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:20:51,193 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 28 treesize of output 24 [2022-11-25 22:20:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 7 proven. 165 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-25 22:20:51,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749127052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:51,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1377727541] [2022-11-25 22:20:51,390 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:20:51,390 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:51,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:51,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:51,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:51,460 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:20:51,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:20:51,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:51,499 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:20:51,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:20:51,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:51,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:20:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:51,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:51,983 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:20:51,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:20:52,048 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 20 treesize of output 17 [2022-11-25 22:20:52,134 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:20:52,135 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:20:53,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12165#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:20:53,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:20:53,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:20:53,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 22] total 46 [2022-11-25 22:20:53,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987726268] [2022-11-25 22:20:53,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:20:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 22:20:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 22:20:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3033, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 22:20:53,561 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2022-11-25 22:20:55,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:57,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 22:20:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:59,497 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2022-11-25 22:20:59,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 22:20:59,498 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) Word has length 73 [2022-11-25 22:20:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:59,499 INFO L225 Difference]: With dead ends: 170 [2022-11-25 22:20:59,499 INFO L226 Difference]: Without dead ends: 168 [2022-11-25 22:20:59,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 172 SyntacticMatches, 12 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=641, Invalid=6165, Unknown=0, NotChecked=0, Total=6806 [2022-11-25 22:20:59,501 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:59,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 453 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1279 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-25 22:20:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-25 22:20:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 103. [2022-11-25 22:20:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 80 states have internal predecessors, (84), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 22:20:59,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2022-11-25 22:20:59,565 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 73 [2022-11-25 22:20:59,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:59,566 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2022-11-25 22:20:59,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2022-11-25 22:20:59,566 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2022-11-25 22:20:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:20:59,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:59,568 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:59,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 22:20:59,775 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1630136123, now seen corresponding path program 20 times [2022-11-25 22:20:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972604470] [2022-11-25 22:20:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:59,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 9 proven. 176 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:21:00,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972604470] [2022-11-25 22:21:00,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972604470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:21:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173079447] [2022-11-25 22:21:00,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:21:00,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:21:00,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:21:00,867 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:21:00,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 22:21:01,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-25 22:21:01,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:21:01,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 22:21:01,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:21:01,741 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 15 treesize of output 11 [2022-11-25 22:21:02,641 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 22:21:02,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-25 22:21:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 79 proven. 106 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:21:02,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:21:03,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:21:03,724 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 34 treesize of output 28 [2022-11-25 22:21:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 72 proven. 113 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:21:04,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173079447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:21:04,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093592665] [2022-11-25 22:21:04,605 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:21:04,606 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:21:04,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:21:04,606 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:21:04,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:21:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:04,677 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:21:04,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:21:04,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:04,717 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:21:04,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:21:04,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:04,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:21:05,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:05,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:05,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:05,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:05,248 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:21:05,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:21:05,366 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 20 treesize of output 17 [2022-11-25 22:21:05,505 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:21:05,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:21:07,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13119#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:21:07,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:21:07,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:21:07,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 62 [2022-11-25 22:21:07,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790727176] [2022-11-25 22:21:07,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:21:07,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-25 22:21:07,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:07,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-25 22:21:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=4918, Unknown=0, NotChecked=0, Total=5402 [2022-11-25 22:21:07,420 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 62 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 57 states have internal predecessors, (127), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-11-25 22:21:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:21:15,866 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2022-11-25 22:21:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-25 22:21:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 57 states have internal predecessors, (127), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 74 [2022-11-25 22:21:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:21:15,868 INFO L225 Difference]: With dead ends: 178 [2022-11-25 22:21:15,868 INFO L226 Difference]: Without dead ends: 110 [2022-11-25 22:21:15,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5788 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2320, Invalid=18850, Unknown=0, NotChecked=0, Total=21170 [2022-11-25 22:21:15,872 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:21:15,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 578 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-25 22:21:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-25 22:21:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2022-11-25 22:21:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 22:21:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-11-25 22:21:15,917 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 74 [2022-11-25 22:21:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:21:15,918 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-11-25 22:21:15,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 57 states have internal predecessors, (127), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-11-25 22:21:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-11-25 22:21:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-25 22:21:15,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:21:15,922 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:21:15,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 22:21:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 22:21:16,130 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:21:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:21:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1512359804, now seen corresponding path program 21 times [2022-11-25 22:21:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:21:16,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180041348] [2022-11-25 22:21:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:16,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:21:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 9 proven. 203 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 22:21:17,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:17,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180041348] [2022-11-25 22:21:17,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180041348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:21:17,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6486451] [2022-11-25 22:21:17,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:21:17,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:21:17,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:21:17,179 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:21:17,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 22:21:17,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:21:17,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:21:17,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-25 22:21:17,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:21:18,110 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 [2022-11-25 22:21:18,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:21:18,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:21:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 27 proven. 203 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:21:18,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:21:19,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:21:19,067 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 31 treesize of output 27 [2022-11-25 22:21:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 9 proven. 203 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 22:21:19,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6486451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:21:19,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288907942] [2022-11-25 22:21:19,356 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:21:19,356 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:21:19,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:21:19,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:21:19,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:21:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:19,419 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:21:19,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:21:19,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:19,463 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:21:19,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:21:19,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:19,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:21:19,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:19,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:19,949 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:21:19,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:21:20,022 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 20 treesize of output 17 [2022-11-25 22:21:20,119 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:21:20,120 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:21:21,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14170#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:21:21,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:21:21,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:21:21,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 25] total 52 [2022-11-25 22:21:21,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077271202] [2022-11-25 22:21:21,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:21:21,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-25 22:21:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-25 22:21:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=3743, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 22:21:21,789 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 52 states, 49 states have (on average 2.061224489795918) internal successors, (101), 47 states have internal predecessors, (101), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 22:21:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:21:24,365 INFO L93 Difference]: Finished difference Result 159 states and 165 transitions. [2022-11-25 22:21:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-25 22:21:24,366 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.061224489795918) internal successors, (101), 47 states have internal predecessors, (101), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 79 [2022-11-25 22:21:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:21:24,367 INFO L225 Difference]: With dead ends: 159 [2022-11-25 22:21:24,367 INFO L226 Difference]: Without dead ends: 157 [2022-11-25 22:21:24,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 194 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3315 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=902, Invalid=10228, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 22:21:24,369 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 246 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:21:24,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 652 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 22:21:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-25 22:21:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2022-11-25 22:21:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 22:21:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2022-11-25 22:21:24,427 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 79 [2022-11-25 22:21:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:21:24,428 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2022-11-25 22:21:24,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.061224489795918) internal successors, (101), 47 states have internal predecessors, (101), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 22:21:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2022-11-25 22:21:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 22:21:24,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:21:24,429 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:21:24,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 22:21:24,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:21:24,635 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:21:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:21:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2104073731, now seen corresponding path program 22 times [2022-11-25 22:21:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:21:24,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646247866] [2022-11-25 22:21:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:24,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:21:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 11 proven. 211 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 22:21:25,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646247866] [2022-11-25 22:21:25,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646247866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:21:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061646382] [2022-11-25 22:21:25,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:21:25,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:21:25,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:21:25,675 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:21:25,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 22:21:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-25 22:21:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:21:26,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:21:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:26,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:21:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:26,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:21:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:26,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:21:27,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:21:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 66 proven. 208 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 22:21:27,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:21:27,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:21:27,451 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 28 treesize of output 24 [2022-11-25 22:21:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 8 proven. 211 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-25 22:21:27,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061646382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:21:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1021043607] [2022-11-25 22:21:27,706 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:21:27,706 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:21:27,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:21:27,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:21:27,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:21:27,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:27,772 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:21:27,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:21:27,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:27,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:21:27,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:27,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:21:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:28,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:28,285 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:21:28,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:21:28,344 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 20 treesize of output 17 [2022-11-25 22:21:28,426 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:21:28,427 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:21:29,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15175#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:21:29,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:21:29,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:21:29,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 23] total 48 [2022-11-25 22:21:29,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361951745] [2022-11-25 22:21:29,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:21:29,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 22:21:29,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:29,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 22:21:29,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3263, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 22:21:29,928 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 48 states, 46 states have (on average 2.108695652173913) internal successors, (97), 44 states have internal predecessors, (97), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-25 22:21:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:21:31,625 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2022-11-25 22:21:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 22:21:31,626 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.108695652173913) internal successors, (97), 44 states have internal predecessors, (97), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) Word has length 81 [2022-11-25 22:21:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:21:31,627 INFO L225 Difference]: With dead ends: 140 [2022-11-25 22:21:31,627 INFO L226 Difference]: Without dead ends: 138 [2022-11-25 22:21:31,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 196 SyntacticMatches, 12 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=585, Invalid=6057, Unknown=0, NotChecked=0, Total=6642 [2022-11-25 22:21:31,629 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:21:31,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 634 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:21:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-25 22:21:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 87. [2022-11-25 22:21:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 22:21:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2022-11-25 22:21:31,686 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 81 [2022-11-25 22:21:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:21:31,686 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2022-11-25 22:21:31,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.108695652173913) internal successors, (97), 44 states have internal predecessors, (97), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-25 22:21:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2022-11-25 22:21:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:21:31,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:21:31,688 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:21:31,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 22:21:31,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 22:21:31,893 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:21:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:21:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash -498474492, now seen corresponding path program 23 times [2022-11-25 22:21:31,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:21:31,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001609677] [2022-11-25 22:21:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:31,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:21:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 10 proven. 225 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 22:21:32,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:32,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001609677] [2022-11-25 22:21:32,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001609677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:21:32,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235463347] [2022-11-25 22:21:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:21:32,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:21:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:21:32,769 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:21:32,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 22:21:33,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-25 22:21:33,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:21:33,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 22:21:33,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:21:34,125 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 15 treesize of output 11 [2022-11-25 22:21:34,943 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 22:21:34,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-25 22:21:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 104 proven. 137 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-25 22:21:34,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:21:35,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:21:35,824 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 34 treesize of output 28 [2022-11-25 22:21:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 94 proven. 141 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 22:21:36,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235463347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:21:36,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688400944] [2022-11-25 22:21:36,634 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:21:36,635 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:21:36,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:21:36,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:21:36,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:21:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:36,705 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:21:36,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:21:36,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:36,754 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:21:36,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:21:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:36,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:21:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:37,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:37,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:37,311 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:21:37,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:21:37,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-25 22:21:37,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:21:37,465 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:21:39,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16115#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:21:39,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:21:39,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:21:39,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 67 [2022-11-25 22:21:39,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159425738] [2022-11-25 22:21:39,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:21:39,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-25 22:21:39,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:39,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-25 22:21:39,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=5601, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 22:21:39,111 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 67 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 62 states have internal predecessors, (142), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-11-25 22:21:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:21:44,665 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2022-11-25 22:21:44,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 22:21:44,666 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 62 states have internal predecessors, (142), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) Word has length 82 [2022-11-25 22:21:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:21:44,667 INFO L225 Difference]: With dead ends: 148 [2022-11-25 22:21:44,667 INFO L226 Difference]: Without dead ends: 118 [2022-11-25 22:21:44,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1895, Invalid=16195, Unknown=0, NotChecked=0, Total=18090 [2022-11-25 22:21:44,669 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 344 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:21:44,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 454 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 22:21:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-25 22:21:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2022-11-25 22:21:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 22:21:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2022-11-25 22:21:44,729 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 82 [2022-11-25 22:21:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:21:44,729 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2022-11-25 22:21:44,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 62 states have internal predecessors, (142), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-11-25 22:21:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2022-11-25 22:21:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 22:21:44,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:21:44,730 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:21:44,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 22:21:44,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 22:21:44,937 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:21:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:21:44,937 INFO L85 PathProgramCache]: Analyzing trace with hash -53554493, now seen corresponding path program 24 times [2022-11-25 22:21:44,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:21:44,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140787257] [2022-11-25 22:21:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:44,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:21:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 10 proven. 255 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 22:21:45,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140787257] [2022-11-25 22:21:45,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140787257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:21:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728824648] [2022-11-25 22:21:45,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:21:45,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:21:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:21:45,928 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:21:45,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 22:21:46,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:21:46,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:21:46,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-25 22:21:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:21:46,759 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 [2022-11-25 22:21:46,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:21:47,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:21:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 31 proven. 260 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-25 22:21:47,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:21:47,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:21:47,663 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 31 treesize of output 27 [2022-11-25 22:21:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 10 proven. 255 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 22:21:47,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728824648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:21:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129641907] [2022-11-25 22:21:47,941 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:21:47,942 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:21:47,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:21:47,942 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:21:47,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:21:47,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:48,018 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:21:48,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:21:48,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:48,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:21:48,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:48,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:21:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:48,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:48,562 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:21:48,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:21:48,628 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 20 treesize of output 17 [2022-11-25 22:21:48,734 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:21:48,736 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:21:50,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17149#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:21:50,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:21:50,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:21:50,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 26] total 52 [2022-11-25 22:21:50,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699641677] [2022-11-25 22:21:50,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:21:50,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-25 22:21:50,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-25 22:21:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3748, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 22:21:50,406 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 52 states, 50 states have (on average 2.14) internal successors, (107), 48 states have internal predecessors, (107), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-25 22:21:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:21:52,965 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2022-11-25 22:21:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 22:21:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 2.14) internal successors, (107), 48 states have internal predecessors, (107), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) Word has length 87 [2022-11-25 22:21:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:21:52,967 INFO L225 Difference]: With dead ends: 173 [2022-11-25 22:21:52,967 INFO L226 Difference]: Without dead ends: 171 [2022-11-25 22:21:52,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 218 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=792, Invalid=9108, Unknown=0, NotChecked=0, Total=9900 [2022-11-25 22:21:52,968 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 200 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:21:52,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 852 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 22:21:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-25 22:21:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 121. [2022-11-25 22:21:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 93 states have (on average 1.053763440860215) internal successors, (98), 94 states have internal predecessors, (98), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 22:21:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2022-11-25 22:21:53,075 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 87 [2022-11-25 22:21:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:21:53,075 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2022-11-25 22:21:53,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 2.14) internal successors, (107), 48 states have internal predecessors, (107), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-25 22:21:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2022-11-25 22:21:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-25 22:21:53,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:21:53,076 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:21:53,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 22:21:53,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 22:21:53,277 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:21:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:21:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash -215296732, now seen corresponding path program 25 times [2022-11-25 22:21:53,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:21:53,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44575523] [2022-11-25 22:21:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:53,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:21:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 12 proven. 263 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-25 22:21:54,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:54,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44575523] [2022-11-25 22:21:54,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44575523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:21:54,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690077052] [2022-11-25 22:21:54,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:21:54,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:21:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:21:54,492 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:21:54,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 22:21:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:54,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-25 22:21:54,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:21:55,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:21:55,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:55,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:21:55,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:55,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:21:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:55,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:21:56,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:21:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 73 proven. 261 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-25 22:21:56,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:21:56,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:21:56,674 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 28 treesize of output 24 [2022-11-25 22:21:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 9 proven. 263 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-25 22:21:56,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690077052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:21:56,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612178834] [2022-11-25 22:21:56,973 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:21:56,973 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:21:56,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:21:56,973 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:21:56,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:21:57,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:57,056 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:21:57,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:21:57,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:57,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:21:57,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:57,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:21:57,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:57,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:57,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:57,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:57,610 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:21:57,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:21:57,708 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 20 treesize of output 17 [2022-11-25 22:21:57,806 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:21:57,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:21:59,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18237#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:21:59,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:21:59,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:21:59,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 25] total 54 [2022-11-25 22:21:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924553483] [2022-11-25 22:21:59,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:21:59,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-25 22:21:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-25 22:21:59,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3985, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 22:21:59,403 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 54 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 49 states have internal predecessors, (109), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 26 states have call predecessors, (26), 25 states have call successors, (26) [2022-11-25 22:22:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:01,568 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2022-11-25 22:22:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 22:22:01,569 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 49 states have internal predecessors, (109), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 26 states have call predecessors, (26), 25 states have call successors, (26) Word has length 89 [2022-11-25 22:22:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:01,570 INFO L225 Difference]: With dead ends: 157 [2022-11-25 22:22:01,570 INFO L226 Difference]: Without dead ends: 155 [2022-11-25 22:22:01,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 218 SyntacticMatches, 11 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2495 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=643, Invalid=7367, Unknown=0, NotChecked=0, Total=8010 [2022-11-25 22:22:01,572 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 106 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 2086 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:01,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 704 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2086 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:22:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-25 22:22:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2022-11-25 22:22:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 22:22:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2022-11-25 22:22:01,637 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 89 [2022-11-25 22:22:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:01,638 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2022-11-25 22:22:01,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 49 states have internal predecessors, (109), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 26 states have call predecessors, (26), 25 states have call successors, (26) [2022-11-25 22:22:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2022-11-25 22:22:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-25 22:22:01,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:01,639 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:22:01,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:01,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 22:22:01,846 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:01,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2003522715, now seen corresponding path program 26 times [2022-11-25 22:22:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:01,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987591761] [2022-11-25 22:22:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:01,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 11 proven. 280 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 22:22:02,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:02,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987591761] [2022-11-25 22:22:02,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987591761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:22:02,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025091019] [2022-11-25 22:22:02,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:22:02,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:02,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:02,979 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:02,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 22:22:03,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-25 22:22:03,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:22:03,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-25 22:22:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:04,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:22:04,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 22:22:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 11 proven. 280 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 22:22:04,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:22:05,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:22:05,490 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 24 treesize of output 20 [2022-11-25 22:22:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 11 proven. 280 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 22:22:06,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025091019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:22:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355910769] [2022-11-25 22:22:06,304 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:22:06,304 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:22:06,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:22:06,305 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:22:06,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:22:06,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:06,376 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:22:06,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:22:06,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:06,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:22:06,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:06,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:22:06,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:06,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:06,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:06,931 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:22:06,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:22:07,037 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 20 treesize of output 17 [2022-11-25 22:22:07,121 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:22:07,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:22:08,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19278#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:22:08,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:22:08,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:22:08,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 74 [2022-11-25 22:22:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060015601] [2022-11-25 22:22:08,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:22:08,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-25 22:22:08,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-25 22:22:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=6666, Unknown=0, NotChecked=0, Total=7310 [2022-11-25 22:22:08,943 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 74 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 69 states have internal predecessors, (157), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-25 22:22:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:14,169 INFO L93 Difference]: Finished difference Result 200 states and 216 transitions. [2022-11-25 22:22:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-25 22:22:14,169 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 69 states have internal predecessors, (157), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 90 [2022-11-25 22:22:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:14,171 INFO L225 Difference]: With dead ends: 200 [2022-11-25 22:22:14,171 INFO L226 Difference]: Without dead ends: 198 [2022-11-25 22:22:14,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6122 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1923, Invalid=17817, Unknown=0, NotChecked=0, Total=19740 [2022-11-25 22:22:14,173 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 203 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:14,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 922 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 22:22:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-25 22:22:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 131. [2022-11-25 22:22:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 104 states have internal predecessors, (107), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 22:22:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2022-11-25 22:22:14,307 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 90 [2022-11-25 22:22:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:14,308 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2022-11-25 22:22:14,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 69 states have internal predecessors, (157), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-25 22:22:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2022-11-25 22:22:14,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 22:22:14,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:14,309 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:22:14,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:14,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:14,517 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:14,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1506251484, now seen corresponding path program 27 times [2022-11-25 22:22:14,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:14,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625632543] [2022-11-25 22:22:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:14,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 11 proven. 313 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-25 22:22:15,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:15,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625632543] [2022-11-25 22:22:15,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625632543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:22:15,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737071742] [2022-11-25 22:22:15,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:22:15,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:15,703 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:15,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 22:22:15,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:22:15,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:22:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-25 22:22:15,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:16,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:22:16,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:22:17,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:22:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 33 proven. 313 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 22:22:17,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:22:17,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:22:17,946 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 31 treesize of output 27 [2022-11-25 22:22:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 11 proven. 313 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-25 22:22:18,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737071742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:22:18,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [66060411] [2022-11-25 22:22:18,222 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:22:18,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:22:18,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:22:18,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:22:18,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:22:18,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:18,283 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:22:18,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:22:18,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:18,350 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:22:18,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:22:18,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:18,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:22:18,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:18,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:18,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:18,842 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:22:18,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:22:18,942 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 20 treesize of output 17 [2022-11-25 22:22:19,027 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:22:19,029 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:22:20,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20496#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:22:20,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:22:20,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:22:20,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31, 29] total 58 [2022-11-25 22:22:20,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040987312] [2022-11-25 22:22:20,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:22:20,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-25 22:22:20,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-25 22:22:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=4510, Unknown=0, NotChecked=0, Total=4830 [2022-11-25 22:22:20,683 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 58 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 54 states have internal predecessors, (117), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-25 22:22:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:24,085 INFO L93 Difference]: Finished difference Result 246 states and 253 transitions. [2022-11-25 22:22:24,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 22:22:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 54 states have internal predecessors, (117), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) Word has length 95 [2022-11-25 22:22:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:24,087 INFO L225 Difference]: With dead ends: 246 [2022-11-25 22:22:24,087 INFO L226 Difference]: Without dead ends: 244 [2022-11-25 22:22:24,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 238 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4152 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1016, Invalid=12790, Unknown=0, NotChecked=0, Total=13806 [2022-11-25 22:22:24,089 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 222 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:24,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1012 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 22:22:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-25 22:22:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 159. [2022-11-25 22:22:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 131 states have (on average 1.0458015267175573) internal successors, (137), 131 states have internal predecessors, (137), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 22:22:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2022-11-25 22:22:24,253 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 167 transitions. Word has length 95 [2022-11-25 22:22:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:24,253 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 167 transitions. [2022-11-25 22:22:24,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 54 states have internal predecessors, (117), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-25 22:22:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 167 transitions. [2022-11-25 22:22:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-25 22:22:24,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:24,255 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 12, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:22:24,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-25 22:22:24,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:24,461 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:24,462 INFO L85 PathProgramCache]: Analyzing trace with hash -376975517, now seen corresponding path program 28 times [2022-11-25 22:22:24,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:24,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133912294] [2022-11-25 22:22:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:24,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 13 proven. 321 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-25 22:22:25,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:25,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133912294] [2022-11-25 22:22:25,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133912294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:22:25,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362673029] [2022-11-25 22:22:25,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:22:25,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:25,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:25,858 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:25,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 22:22:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-25 22:22:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:26,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:22:26,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:26,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:22:27,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:27,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:22:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:27,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:22:27,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:22:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 81 proven. 319 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 22:22:27,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:22:28,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:22:28,161 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 28 treesize of output 24 [2022-11-25 22:22:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 10 proven. 321 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-25 22:22:28,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362673029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:22:28,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486430205] [2022-11-25 22:22:28,501 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:22:28,501 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:22:28,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:22:28,501 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:22:28,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:22:28,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:28,573 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:22:28,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:22:28,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:28,614 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:22:28,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:22:28,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:28,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:22:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:29,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:29,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:29,115 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:22:29,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:22:29,181 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 20 treesize of output 17 [2022-11-25 22:22:29,287 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:22:29,289 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:22:30,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21810#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:22:30,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:22:30,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:22:30,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 27] total 58 [2022-11-25 22:22:30,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626201478] [2022-11-25 22:22:30,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:22:30,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-25 22:22:30,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-25 22:22:30,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=4506, Unknown=0, NotChecked=0, Total=4830 [2022-11-25 22:22:30,959 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. Second operand has 58 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 53 states have internal predecessors, (119), 27 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 28 states have call predecessors, (28), 27 states have call successors, (28) [2022-11-25 22:22:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:33,205 INFO L93 Difference]: Finished difference Result 227 states and 235 transitions. [2022-11-25 22:22:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 22:22:33,206 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 53 states have internal predecessors, (119), 27 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 28 states have call predecessors, (28), 27 states have call successors, (28) Word has length 97 [2022-11-25 22:22:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:33,207 INFO L225 Difference]: With dead ends: 227 [2022-11-25 22:22:33,207 INFO L226 Difference]: Without dead ends: 225 [2022-11-25 22:22:33,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 240 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=690, Invalid=8430, Unknown=0, NotChecked=0, Total=9120 [2022-11-25 22:22:33,208 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 124 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:33,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 668 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:22:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-25 22:22:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 133. [2022-11-25 22:22:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 22:22:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 140 transitions. [2022-11-25 22:22:33,297 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 140 transitions. Word has length 97 [2022-11-25 22:22:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:33,298 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 140 transitions. [2022-11-25 22:22:33,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 53 states have internal predecessors, (119), 27 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 28 states have call predecessors, (28), 27 states have call successors, (28) [2022-11-25 22:22:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 140 transitions. [2022-11-25 22:22:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-25 22:22:33,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:33,299 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:22:33,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:33,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:33,506 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:33,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1085860196, now seen corresponding path program 29 times [2022-11-25 22:22:33,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:33,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128226288] [2022-11-25 22:22:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:33,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 12 proven. 341 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-25 22:22:34,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:34,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128226288] [2022-11-25 22:22:34,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128226288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:22:34,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777442589] [2022-11-25 22:22:34,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:22:34,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:34,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:34,819 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:34,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 22:22:35,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-25 22:22:35,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:22:35,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 22:22:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:36,345 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 15 treesize of output 11 [2022-11-25 22:22:37,403 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 22:22:37,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-25 22:22:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 157 proven. 196 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-25 22:22:37,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:22:38,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:22:38,687 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 34 treesize of output 28 [2022-11-25 22:22:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 147 proven. 206 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-25 22:22:39,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777442589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:22:39,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843013309] [2022-11-25 22:22:39,775 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:22:39,776 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:22:39,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:22:39,776 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:22:39,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:22:39,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:39,854 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:22:39,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:22:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:39,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:22:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:39,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:22:40,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:40,355 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:22:40,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:22:40,420 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 20 treesize of output 17 [2022-11-25 22:22:40,516 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:22:40,517 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:22:42,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23050#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:22:42,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:22:42,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:22:42,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 80 [2022-11-25 22:22:42,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98493190] [2022-11-25 22:22:42,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:22:42,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-25 22:22:42,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:42,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-25 22:22:42,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=7627, Unknown=0, NotChecked=0, Total=8372 [2022-11-25 22:22:42,347 INFO L87 Difference]: Start difference. First operand 133 states and 140 transitions. Second operand has 80 states, 78 states have (on average 2.2051282051282053) internal successors, (172), 75 states have internal predecessors, (172), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-11-25 22:22:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:53,487 INFO L93 Difference]: Finished difference Result 235 states and 242 transitions. [2022-11-25 22:22:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-25 22:22:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 2.2051282051282053) internal successors, (172), 75 states have internal predecessors, (172), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) Word has length 98 [2022-11-25 22:22:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:53,489 INFO L225 Difference]: With dead ends: 235 [2022-11-25 22:22:53,489 INFO L226 Difference]: Without dead ends: 140 [2022-11-25 22:22:53,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10045 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=3733, Invalid=32557, Unknown=0, NotChecked=0, Total=36290 [2022-11-25 22:22:53,491 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 401 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 3458 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 3689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 3458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:53,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 1150 Invalid, 3689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 3458 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 22:22:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-25 22:22:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2022-11-25 22:22:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 22:22:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2022-11-25 22:22:53,563 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 98 [2022-11-25 22:22:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:53,564 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2022-11-25 22:22:53,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 2.2051282051282053) internal successors, (172), 75 states have internal predecessors, (172), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-11-25 22:22:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2022-11-25 22:22:53,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-25 22:22:53,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:53,564 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 12, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:22:53,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:53,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:53,765 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1109031971, now seen corresponding path program 30 times [2022-11-25 22:22:53,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:53,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373023554] [2022-11-25 22:22:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:53,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 377 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-25 22:22:55,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:55,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373023554] [2022-11-25 22:22:55,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373023554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:22:55,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189567785] [2022-11-25 22:22:55,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:22:55,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:55,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:55,063 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:55,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 22:22:55,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:22:55,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:22:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-25 22:22:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:56,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:22:56,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:22:57,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:22:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 42 proven. 379 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-25 22:22:57,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:22:57,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:22:57,386 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 31 treesize of output 27 [2022-11-25 22:22:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 377 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-25 22:22:57,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189567785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:22:57,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422013993] [2022-11-25 22:22:57,809 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:22:57,810 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:22:57,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:22:57,810 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:22:57,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:22:57,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:57,878 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:22:57,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:22:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:57,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:22:58,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:58,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:22:58,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:58,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:58,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:58,388 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:22:58,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:22:58,458 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 20 treesize of output 17 [2022-11-25 22:22:58,541 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:22:58,542 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:00,220 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24419#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:00,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:00,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:23:00,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 30] total 62 [2022-11-25 22:23:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819132822] [2022-11-25 22:23:00,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-25 22:23:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-25 22:23:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=5071, Unknown=0, NotChecked=0, Total=5402 [2022-11-25 22:23:00,224 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 62 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 27 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 28 states have call predecessors, (28), 27 states have call successors, (28) [2022-11-25 22:23:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:03,479 INFO L93 Difference]: Finished difference Result 201 states and 207 transitions. [2022-11-25 22:23:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 22:23:03,479 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 27 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 28 states have call predecessors, (28), 27 states have call successors, (28) Word has length 103 [2022-11-25 22:23:03,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:03,480 INFO L225 Difference]: With dead ends: 201 [2022-11-25 22:23:03,480 INFO L226 Difference]: Without dead ends: 199 [2022-11-25 22:23:03,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 262 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=932, Invalid=12408, Unknown=0, NotChecked=0, Total=13340 [2022-11-25 22:23:03,481 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 331 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 2873 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 2960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:03,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 1041 Invalid, 2960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2873 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 22:23:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-25 22:23:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 143. [2022-11-25 22:23:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 111 states have (on average 1.045045045045045) internal successors, (116), 112 states have internal predecessors, (116), 17 states have call successors, (17), 14 states have call predecessors, (17), 14 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 22:23:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 150 transitions. [2022-11-25 22:23:03,599 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 150 transitions. Word has length 103 [2022-11-25 22:23:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:03,599 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 150 transitions. [2022-11-25 22:23:03,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 27 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 28 states have call predecessors, (28), 27 states have call successors, (28) [2022-11-25 22:23:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 150 transitions. [2022-11-25 22:23:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-25 22:23:03,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:03,600 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 13, 13, 13, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:03,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:03,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 22:23:03,801 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1660602820, now seen corresponding path program 31 times [2022-11-25 22:23:03,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:03,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23956401] [2022-11-25 22:23:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:03,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 14 proven. 385 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-25 22:23:05,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23956401] [2022-11-25 22:23:05,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23956401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721706818] [2022-11-25 22:23:05,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:23:05,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:05,299 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:05,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 22:23:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:05,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-25 22:23:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:06,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:23:06,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:06,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:23:06,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:06,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:23:06,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:06,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:23:07,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:23:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 85 proven. 387 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-25 22:23:07,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:07,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721706818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:07,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963378345] [2022-11-25 22:23:07,653 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:23:07,653 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:07,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:07,653 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:07,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:07,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:07,720 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:23:07,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:23:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:07,757 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:23:07,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:23:07,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:07,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:23:08,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:08,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:08,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:08,260 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:23:08,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:23:08,321 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 20 treesize of output 17 [2022-11-25 22:23:08,411 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:23:08,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:10,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25481#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:10,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:10,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:23:10,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 59 [2022-11-25 22:23:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154860236] [2022-11-25 22:23:10,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:10,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-25 22:23:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:10,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-25 22:23:10,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=4916, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 22:23:10,064 INFO L87 Difference]: Start difference. First operand 143 states and 150 transitions. Second operand has 59 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 55 states have internal predecessors, (121), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-25 22:23:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:12,774 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2022-11-25 22:23:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 22:23:12,775 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 55 states have internal predecessors, (121), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 105 [2022-11-25 22:23:12,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:12,776 INFO L225 Difference]: With dead ends: 185 [2022-11-25 22:23:12,776 INFO L226 Difference]: Without dead ends: 183 [2022-11-25 22:23:12,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 196 SyntacticMatches, 6 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3091 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=757, Invalid=9343, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 22:23:12,778 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 160 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:12,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 888 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 22:23:12,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-25 22:23:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 114. [2022-11-25 22:23:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 17 states have call successors, (17), 14 states have call predecessors, (17), 14 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 22:23:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2022-11-25 22:23:12,843 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 105 [2022-11-25 22:23:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:12,843 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2022-11-25 22:23:12,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 55 states have internal predecessors, (121), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-25 22:23:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2022-11-25 22:23:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-25 22:23:12,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:12,844 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:12,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:13,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 22:23:13,044 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2006448635, now seen corresponding path program 32 times [2022-11-25 22:23:13,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:13,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658291073] [2022-11-25 22:23:13,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:13,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 13 proven. 408 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-25 22:23:14,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:14,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658291073] [2022-11-25 22:23:14,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658291073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266515820] [2022-11-25 22:23:14,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:23:14,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:14,776 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:14,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 22:23:15,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-25 22:23:15,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:23:15,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 22:23:15,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:15,840 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 15 treesize of output 11 [2022-11-25 22:23:16,895 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 22:23:16,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-25 22:23:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 189 proven. 232 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-25 22:23:16,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:17,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:23:17,982 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 34 treesize of output 28 [2022-11-25 22:23:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 178 proven. 243 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-25 22:23:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266515820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:23:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637638119] [2022-11-25 22:23:19,066 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:23:19,066 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:19,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:19,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:19,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:19,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:19,130 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:23:19,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:23:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:19,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:23:19,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:19,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:23:19,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:19,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:19,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:19,671 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:23:19,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:23:19,733 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 20 treesize of output 17 [2022-11-25 22:23:19,822 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:23:19,823 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:21,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26703#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:21,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:21,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:23:21,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 87 [2022-11-25 22:23:21,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77307315] [2022-11-25 22:23:21,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:21,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-25 22:23:21,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:21,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-25 22:23:21,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=8612, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 22:23:21,464 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand has 87 states, 85 states have (on average 2.211764705882353) internal successors, (188), 81 states have internal predecessors, (188), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2022-11-25 22:23:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:27,443 INFO L93 Difference]: Finished difference Result 193 states and 199 transitions. [2022-11-25 22:23:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-25 22:23:27,444 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 85 states have (on average 2.211764705882353) internal successors, (188), 81 states have internal predecessors, (188), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) Word has length 106 [2022-11-25 22:23:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:27,445 INFO L225 Difference]: With dead ends: 193 [2022-11-25 22:23:27,445 INFO L226 Difference]: Without dead ends: 154 [2022-11-25 22:23:27,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8487 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2979, Invalid=22781, Unknown=0, NotChecked=0, Total=25760 [2022-11-25 22:23:27,447 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 324 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:27,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 559 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 22:23:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-25 22:23:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2022-11-25 22:23:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 17 states have call successors, (17), 14 states have call predecessors, (17), 14 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 22:23:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2022-11-25 22:23:27,544 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 106 [2022-11-25 22:23:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:27,545 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2022-11-25 22:23:27,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 85 states have (on average 2.211764705882353) internal successors, (188), 81 states have internal predecessors, (188), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2022-11-25 22:23:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2022-11-25 22:23:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 22:23:27,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:27,546 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 13, 13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:27,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:27,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:27,752 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1059482052, now seen corresponding path program 33 times [2022-11-25 22:23:27,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:27,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806653023] [2022-11-25 22:23:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:27,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 13 proven. 447 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-25 22:23:29,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806653023] [2022-11-25 22:23:29,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806653023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032277223] [2022-11-25 22:23:29,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:23:29,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:29,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:29,621 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:29,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 22:23:29,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:23:29,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:23:29,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-25 22:23:29,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:30,391 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 [2022-11-25 22:23:30,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-25 22:23:31,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:23:31,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:23:31,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-11-25 22:23:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 39 proven. 447 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-25 22:23:31,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:31,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032277223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:31,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467260387] [2022-11-25 22:23:31,687 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:23:31,688 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:31,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:31,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:31,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:31,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:31,752 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:23:31,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:23:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:31,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:23:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:31,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:23:32,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:32,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:32,230 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:23:32,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:23:32,299 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 20 treesize of output 17 [2022-11-25 22:23:32,380 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:23:32,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:33,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27788#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:33,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:33,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:23:33,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35] total 39 [2022-11-25 22:23:33,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401305484] [2022-11-25 22:23:33,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:33,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 22:23:33,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:33,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 22:23:33,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3989, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 22:23:33,806 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 39 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-11-25 22:23:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:37,923 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2022-11-25 22:23:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-25 22:23:37,924 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 111 [2022-11-25 22:23:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:37,925 INFO L225 Difference]: With dead ends: 215 [2022-11-25 22:23:37,925 INFO L226 Difference]: Without dead ends: 213 [2022-11-25 22:23:37,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3613 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=902, Invalid=11530, Unknown=0, NotChecked=0, Total=12432 [2022-11-25 22:23:37,926 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 190 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:37,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 742 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 22:23:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-25 22:23:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 151. [2022-11-25 22:23:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 17 states have call successors, (17), 14 states have call predecessors, (17), 14 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 22:23:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2022-11-25 22:23:38,128 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 111 [2022-11-25 22:23:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:38,128 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2022-11-25 22:23:38,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-11-25 22:23:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2022-11-25 22:23:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-25 22:23:38,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:38,130 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 14, 14, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:38,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:38,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 22:23:38,336 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:38,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:38,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1602631875, now seen corresponding path program 34 times [2022-11-25 22:23:38,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:38,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904127736] [2022-11-25 22:23:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:38,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 15 proven. 455 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-25 22:23:39,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:39,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904127736] [2022-11-25 22:23:39,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904127736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:39,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624182088] [2022-11-25 22:23:39,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:23:39,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:39,831 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:39,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 22:23:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:40,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-25 22:23:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:40,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:23:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:41,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:23:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:41,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:23:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:41,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:23:42,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:23:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 96 proven. 448 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-25 22:23:42,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:42,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:23:42,630 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 28 treesize of output 24 [2022-11-25 22:23:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 12 proven. 455 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-11-25 22:23:42,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624182088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:23:42,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993746554] [2022-11-25 22:23:42,914 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:23:42,914 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:42,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:42,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:42,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:42,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:42,982 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:23:42,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:23:42,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:43,020 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:23:43,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:23:43,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:43,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:23:43,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:43,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:43,489 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:23:43,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:23:43,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-25 22:23:43,646 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:23:43,648 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:45,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29154#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:45,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:45,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:23:45,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35, 31] total 65 [2022-11-25 22:23:45,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042885361] [2022-11-25 22:23:45,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:45,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-25 22:23:45,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-25 22:23:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=5495, Unknown=0, NotChecked=0, Total=5852 [2022-11-25 22:23:45,377 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand has 65 states, 62 states have (on average 2.225806451612903) internal successors, (138), 61 states have internal predecessors, (138), 30 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-25 22:23:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:48,267 INFO L93 Difference]: Finished difference Result 196 states and 203 transitions. [2022-11-25 22:23:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 22:23:48,267 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 62 states have (on average 2.225806451612903) internal successors, (138), 61 states have internal predecessors, (138), 30 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 113 [2022-11-25 22:23:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:48,269 INFO L225 Difference]: With dead ends: 196 [2022-11-25 22:23:48,269 INFO L226 Difference]: Without dead ends: 194 [2022-11-25 22:23:48,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 283 SyntacticMatches, 12 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3448 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=773, Invalid=10357, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 22:23:48,270 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 115 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:48,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1191 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 22:23:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-25 22:23:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 119. [2022-11-25 22:23:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 17 states have call successors, (17), 14 states have call predecessors, (17), 14 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 22:23:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2022-11-25 22:23:48,380 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 113 [2022-11-25 22:23:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:48,380 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2022-11-25 22:23:48,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 62 states have (on average 2.225806451612903) internal successors, (138), 61 states have internal predecessors, (138), 30 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-25 22:23:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2022-11-25 22:23:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-25 22:23:48,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:48,382 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:23:48,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-25 22:23:48,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 22:23:48,589 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:48,590 INFO L85 PathProgramCache]: Analyzing trace with hash -679335740, now seen corresponding path program 35 times [2022-11-25 22:23:48,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:48,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491243997] [2022-11-25 22:23:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:48,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 14 proven. 481 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-25 22:23:49,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:49,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491243997] [2022-11-25 22:23:49,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491243997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:49,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224740141] [2022-11-25 22:23:49,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:23:49,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:49,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:49,985 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:49,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 22:23:50,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-25 22:23:50,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:23:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-25 22:23:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:51,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:23:52,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 22:23:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 17 proven. 488 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-25 22:23:52,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:53,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:23:53,488 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 24 treesize of output 20 [2022-11-25 22:23:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 14 proven. 481 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-25 22:23:54,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224740141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:23:54,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916759244] [2022-11-25 22:23:54,711 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:23:54,711 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:54,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:54,711 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:54,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:54,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:54,787 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:23:54,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:23:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:54,835 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:23:54,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:23:54,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:54,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:23:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:55,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:23:55,385 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:23:55,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:23:55,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-25 22:23:55,533 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:23:55,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:57,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30452#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:23:57,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:23:57,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:23:57,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 91 [2022-11-25 22:23:57,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523937243] [2022-11-25 22:23:57,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:23:57,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-25 22:23:57,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:57,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-25 22:23:57,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=900, Invalid=9606, Unknown=0, NotChecked=0, Total=10506 [2022-11-25 22:23:57,703 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand has 91 states, 90 states have (on average 2.2444444444444445) internal successors, (202), 86 states have internal predecessors, (202), 40 states have call successors, (41), 1 states have call predecessors, (41), 2 states have return successors, (42), 42 states have call predecessors, (42), 40 states have call successors, (42) [2022-11-25 22:24:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:05,738 INFO L93 Difference]: Finished difference Result 248 states and 267 transitions. [2022-11-25 22:24:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-25 22:24:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 2.2444444444444445) internal successors, (202), 86 states have internal predecessors, (202), 40 states have call successors, (41), 1 states have call predecessors, (41), 2 states have return successors, (42), 42 states have call predecessors, (42), 40 states have call successors, (42) Word has length 114 [2022-11-25 22:24:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:05,739 INFO L225 Difference]: With dead ends: 248 [2022-11-25 22:24:05,739 INFO L226 Difference]: Without dead ends: 246 [2022-11-25 22:24:05,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9337 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=2740, Invalid=27016, Unknown=0, NotChecked=0, Total=29756 [2022-11-25 22:24:05,741 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 601 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 3214 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 3357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:05,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1154 Invalid, 3357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3214 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 22:24:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-25 22:24:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 161. [2022-11-25 22:24:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 129 states have internal predecessors, (133), 17 states have call successors, (17), 14 states have call predecessors, (17), 14 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 22:24:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 167 transitions. [2022-11-25 22:24:05,898 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 167 transitions. Word has length 114 [2022-11-25 22:24:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:05,898 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 167 transitions. [2022-11-25 22:24:05,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 2.2444444444444445) internal successors, (202), 86 states have internal predecessors, (202), 40 states have call successors, (41), 1 states have call predecessors, (41), 2 states have return successors, (42), 42 states have call predecessors, (42), 40 states have call successors, (42) [2022-11-25 22:24:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 167 transitions. [2022-11-25 22:24:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-25 22:24:05,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:05,899 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:05,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:06,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 22:24:06,103 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:06,103 INFO L85 PathProgramCache]: Analyzing trace with hash 104619395, now seen corresponding path program 36 times [2022-11-25 22:24:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:06,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711267757] [2022-11-25 22:24:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:06,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 14 proven. 523 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-25 22:24:07,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711267757] [2022-11-25 22:24:07,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711267757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995350165] [2022-11-25 22:24:07,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:24:07,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:07,382 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:07,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 22:24:07,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:24:07,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:24:07,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 22:24:07,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:08,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:24:08,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:24:09,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:24:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 42 proven. 523 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-25 22:24:09,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:10,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:24:10,245 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 31 treesize of output 27 [2022-11-25 22:24:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 14 proven. 523 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-25 22:24:10,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995350165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:10,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848548990] [2022-11-25 22:24:10,580 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:24:10,580 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:10,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:10,581 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:10,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:10,643 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:24:10,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:24:10,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:10,682 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:24:10,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:24:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:10,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:24:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:11,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:11,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:11,148 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:24:11,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:24:11,273 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 20 treesize of output 17 [2022-11-25 22:24:11,352 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:24:11,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:13,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31966#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:13,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:13,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:13,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 37, 35] total 70 [2022-11-25 22:24:13,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88211796] [2022-11-25 22:24:13,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:13,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-25 22:24:13,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-25 22:24:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=6267, Unknown=0, NotChecked=0, Total=6642 [2022-11-25 22:24:13,217 INFO L87 Difference]: Start difference. First operand 161 states and 167 transitions. Second operand has 70 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 66 states have internal predecessors, (149), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-25 22:24:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:17,894 INFO L93 Difference]: Finished difference Result 306 states and 313 transitions. [2022-11-25 22:24:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-25 22:24:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 66 states have internal predecessors, (149), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 119 [2022-11-25 22:24:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:17,896 INFO L225 Difference]: With dead ends: 306 [2022-11-25 22:24:17,896 INFO L226 Difference]: Without dead ends: 304 [2022-11-25 22:24:17,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 304 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5734 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1209, Invalid=17973, Unknown=0, NotChecked=0, Total=19182 [2022-11-25 22:24:17,898 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 282 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 3622 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 3710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:17,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1242 Invalid, 3710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3622 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 22:24:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-25 22:24:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 204. [2022-11-25 22:24:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 168 states have (on average 1.0357142857142858) internal successors, (174), 169 states have internal predecessors, (174), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 22:24:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 212 transitions. [2022-11-25 22:24:18,270 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 212 transitions. Word has length 119 [2022-11-25 22:24:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:18,271 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 212 transitions. [2022-11-25 22:24:18,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 66 states have internal predecessors, (149), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-25 22:24:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 212 transitions. [2022-11-25 22:24:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-25 22:24:18,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:18,272 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 15, 15, 15, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:18,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:18,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 22:24:18,479 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1378122140, now seen corresponding path program 37 times [2022-11-25 22:24:18,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:18,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978030563] [2022-11-25 22:24:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:18,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 16 proven. 531 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-25 22:24:20,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:20,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978030563] [2022-11-25 22:24:20,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978030563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:20,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584922112] [2022-11-25 22:24:20,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:24:20,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:20,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:20,219 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:20,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 22:24:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 22:24:20,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:21,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:24:21,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:21,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:24:21,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:21,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:24:21,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:21,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 22:24:22,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:22,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:24:22,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-11-25 22:24:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 102 proven. 532 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-25 22:24:22,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:23,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584922112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:23,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742915852] [2022-11-25 22:24:23,083 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:24:23,083 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:23,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:23,084 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:23,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:23,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:23,152 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:24:23,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:24:23,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:23,192 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:24:23,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:24:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:23,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:24:23,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:23,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:23,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:23,699 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:24:23,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:24:23,759 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 20 treesize of output 17 [2022-11-25 22:24:23,849 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:24:23,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:25,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33357#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:25,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:25,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:24:25,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 53 [2022-11-25 22:24:25,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323480989] [2022-11-25 22:24:25,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:25,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-25 22:24:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-25 22:24:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=5769, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 22:24:25,525 INFO L87 Difference]: Start difference. First operand 204 states and 212 transitions. Second operand has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 49 states have internal predecessors, (104), 30 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 31 states have call predecessors, (33), 30 states have call successors, (33) [2022-11-25 22:24:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:29,363 INFO L93 Difference]: Finished difference Result 290 states and 298 transitions. [2022-11-25 22:24:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-25 22:24:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 49 states have internal predecessors, (104), 30 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 31 states have call predecessors, (33), 30 states have call successors, (33) Word has length 121 [2022-11-25 22:24:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:29,365 INFO L225 Difference]: With dead ends: 290 [2022-11-25 22:24:29,365 INFO L226 Difference]: Without dead ends: 288 [2022-11-25 22:24:29,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 232 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3890 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=859, Invalid=11351, Unknown=0, NotChecked=0, Total=12210 [2022-11-25 22:24:29,367 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 156 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:29,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 790 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 22:24:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-25 22:24:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 169. [2022-11-25 22:24:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.037593984962406) internal successors, (138), 134 states have internal predecessors, (138), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 22:24:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 176 transitions. [2022-11-25 22:24:29,664 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 176 transitions. Word has length 121 [2022-11-25 22:24:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:29,665 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 176 transitions. [2022-11-25 22:24:29,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 49 states have internal predecessors, (104), 30 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 31 states have call predecessors, (33), 30 states have call successors, (33) [2022-11-25 22:24:29,665 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 176 transitions. [2022-11-25 22:24:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-25 22:24:29,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:29,666 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:29,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:29,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:29,874 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:29,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1424349019, now seen corresponding path program 38 times [2022-11-25 22:24:29,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:29,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072125139] [2022-11-25 22:24:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:29,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 15 proven. 560 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-25 22:24:31,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:31,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072125139] [2022-11-25 22:24:31,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072125139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:31,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819289098] [2022-11-25 22:24:31,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:24:31,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:31,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:31,509 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:31,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 22:24:32,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-25 22:24:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:24:32,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-25 22:24:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:32,700 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 15 treesize of output 11 [2022-11-25 22:24:34,414 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 22:24:34,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-11-25 22:24:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 15 proven. 560 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-25 22:24:34,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:35,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:24:35,664 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 24 treesize of output 20 [2022-11-25 22:24:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 15 proven. 560 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-25 22:24:37,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819289098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:37,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1513750922] [2022-11-25 22:24:37,112 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:24:37,112 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:37,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:37,112 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:37,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:37,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:37,199 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:24:37,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:24:37,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:37,253 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:24:37,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:24:37,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:37,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:24:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:37,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:37,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:37,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:37,747 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:24:37,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:24:37,850 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 20 treesize of output 17 [2022-11-25 22:24:37,933 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:24:37,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:40,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34898#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:40,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:40,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:40,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 83 [2022-11-25 22:24:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758701756] [2022-11-25 22:24:40,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-25 22:24:40,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-25 22:24:40,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=8118, Unknown=0, NotChecked=0, Total=8930 [2022-11-25 22:24:40,026 INFO L87 Difference]: Start difference. First operand 169 states and 176 transitions. Second operand has 83 states, 82 states have (on average 2.3048780487804876) internal successors, (189), 78 states have internal predecessors, (189), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2022-11-25 22:24:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:53,922 INFO L93 Difference]: Finished difference Result 345 states and 366 transitions. [2022-11-25 22:24:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-25 22:24:53,922 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.3048780487804876) internal successors, (189), 78 states have internal predecessors, (189), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) Word has length 122 [2022-11-25 22:24:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:53,924 INFO L225 Difference]: With dead ends: 345 [2022-11-25 22:24:53,925 INFO L226 Difference]: Without dead ends: 343 [2022-11-25 22:24:53,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 300 SyntacticMatches, 7 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12298 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=3410, Invalid=36390, Unknown=0, NotChecked=0, Total=39800 [2022-11-25 22:24:53,928 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 410 mSDsluCounter, 1658 mSDsCounter, 0 mSdLazyCounter, 4484 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 4644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 4484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:53,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1709 Invalid, 4644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 4484 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-25 22:24:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-25 22:24:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 175. [2022-11-25 22:24:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 140 states have internal predecessors, (144), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 22:24:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 182 transitions. [2022-11-25 22:24:54,174 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 182 transitions. Word has length 122 [2022-11-25 22:24:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:54,174 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 182 transitions. [2022-11-25 22:24:54,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.3048780487804876) internal successors, (189), 78 states have internal predecessors, (189), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2022-11-25 22:24:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 182 transitions. [2022-11-25 22:24:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-25 22:24:54,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:54,175 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 15, 15, 15, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:54,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:54,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:54,376 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash 91172452, now seen corresponding path program 39 times [2022-11-25 22:24:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:54,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97394124] [2022-11-25 22:24:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:54,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 15 proven. 605 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-25 22:24:56,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:56,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97394124] [2022-11-25 22:24:56,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97394124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:56,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993004347] [2022-11-25 22:24:56,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:24:56,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:56,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:56,057 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:56,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-25 22:24:56,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:24:56,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:24:56,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-25 22:24:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:57,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:24:57,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:57,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:24:59,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:24:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 45 proven. 605 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-25 22:24:59,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:59,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993004347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:59,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17774936] [2022-11-25 22:24:59,484 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:24:59,484 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:59,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:59,484 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:59,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:59,549 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:24:59,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:24:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:59,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:24:59,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:59,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:25:00,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:00,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:00,051 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:25:00,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:25:00,151 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 20 treesize of output 17 [2022-11-25 22:25:00,239 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:25:00,240 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:02,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36445#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:25:02,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:02,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:25:02,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39] total 72 [2022-11-25 22:25:02,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017540164] [2022-11-25 22:25:02,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:02,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-25 22:25:02,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-25 22:25:02,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=7081, Unknown=0, NotChecked=0, Total=7482 [2022-11-25 22:25:02,209 INFO L87 Difference]: Start difference. First operand 175 states and 182 transitions. Second operand has 72 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 68 states have internal predecessors, (153), 32 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-25 22:25:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:07,888 INFO L93 Difference]: Finished difference Result 342 states and 349 transitions. [2022-11-25 22:25:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-25 22:25:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 68 states have internal predecessors, (153), 32 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) Word has length 127 [2022-11-25 22:25:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:07,889 INFO L225 Difference]: With dead ends: 342 [2022-11-25 22:25:07,889 INFO L226 Difference]: Without dead ends: 340 [2022-11-25 22:25:07,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5405 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1072, Invalid=17288, Unknown=0, NotChecked=0, Total=18360 [2022-11-25 22:25:07,891 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 165 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 4916 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 4975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 4916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:07,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1901 Invalid, 4975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 4916 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 22:25:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-25 22:25:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 213. [2022-11-25 22:25:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 177 states have (on average 1.0338983050847457) internal successors, (183), 178 states have internal predecessors, (183), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 22:25:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 221 transitions. [2022-11-25 22:25:08,165 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 221 transitions. Word has length 127 [2022-11-25 22:25:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:08,166 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 221 transitions. [2022-11-25 22:25:08,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 68 states have internal predecessors, (153), 32 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-25 22:25:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 221 transitions. [2022-11-25 22:25:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 22:25:08,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:08,167 INFO L195 NwaCegarLoop]: trace histogram [18, 16, 16, 16, 16, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:08,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:08,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:08,373 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash 383441443, now seen corresponding path program 40 times [2022-11-25 22:25:08,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:08,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797852577] [2022-11-25 22:25:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:08,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 17 proven. 613 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-25 22:25:09,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797852577] [2022-11-25 22:25:09,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797852577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763175302] [2022-11-25 22:25:09,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:25:09,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:09,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:09,875 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:09,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 22:25:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:10,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-25 22:25:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:11,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:25:11,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:11,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:25:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:11,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:25:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:11,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:25:13,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:25:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 107 proven. 607 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-25 22:25:13,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:13,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:25:13,529 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 28 treesize of output 24 [2022-11-25 22:25:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 14 proven. 613 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-11-25 22:25:13,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763175302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:13,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758975593] [2022-11-25 22:25:13,860 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:25:13,860 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:13,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:13,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:13,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:13,935 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:25:13,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:25:13,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:13,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:25:14,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:14,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:25:14,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:14,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:14,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:14,465 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:25:14,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:25:14,530 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 20 treesize of output 17 [2022-11-25 22:25:14,620 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:25:14,621 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:16,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38182#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:25:16,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:16,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:16,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39, 36] total 74 [2022-11-25 22:25:16,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255091620] [2022-11-25 22:25:16,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:16,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-25 22:25:16,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:16,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-25 22:25:16,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=6904, Unknown=0, NotChecked=0, Total=7310 [2022-11-25 22:25:16,468 INFO L87 Difference]: Start difference. First operand 213 states and 221 transitions. Second operand has 74 states, 72 states have (on average 2.2083333333333335) internal successors, (159), 70 states have internal predecessors, (159), 34 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-25 22:25:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:21,272 INFO L93 Difference]: Finished difference Result 307 states and 314 transitions. [2022-11-25 22:25:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 22:25:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 2.2083333333333335) internal successors, (159), 70 states have internal predecessors, (159), 34 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) Word has length 129 [2022-11-25 22:25:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:21,274 INFO L225 Difference]: With dead ends: 307 [2022-11-25 22:25:21,274 INFO L226 Difference]: Without dead ends: 305 [2022-11-25 22:25:21,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 326 SyntacticMatches, 12 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=955, Invalid=14297, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 22:25:21,275 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 138 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 4544 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 4592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:21,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1293 Invalid, 4592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 4544 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 22:25:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-25 22:25:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 169. [2022-11-25 22:25:21,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 22:25:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 174 transitions. [2022-11-25 22:25:21,493 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 174 transitions. Word has length 129 [2022-11-25 22:25:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:21,493 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 174 transitions. [2022-11-25 22:25:21,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 2.2083333333333335) internal successors, (159), 70 states have internal predecessors, (159), 34 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-25 22:25:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 174 transitions. [2022-11-25 22:25:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 22:25:21,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:21,494 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:21,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:21,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:21,695 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:21,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1704697892, now seen corresponding path program 41 times [2022-11-25 22:25:21,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:21,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142392090] [2022-11-25 22:25:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:21,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 16 proven. 645 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-25 22:25:23,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:23,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142392090] [2022-11-25 22:25:23,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142392090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401790948] [2022-11-25 22:25:23,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:25:23,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:23,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:23,197 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:23,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 22:25:23,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-25 22:25:23,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:25:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 22:25:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:25,075 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 15 treesize of output 11 [2022-11-25 22:25:26,631 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 22:25:26,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-25 22:25:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 311 proven. 362 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-25 22:25:26,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:29,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 22:25:29,186 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 34 treesize of output 28 [2022-11-25 22:25:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 289 proven. 372 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-25 22:25:31,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401790948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:31,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1957354689] [2022-11-25 22:25:31,017 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:25:31,017 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:31,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:31,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:31,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:31,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:31,101 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:25:31,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:25:31,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:31,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:25:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:31,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:25:31,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:31,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:31,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:31,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:31,617 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:25:31,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:25:31,713 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 20 treesize of output 17 [2022-11-25 22:25:31,808 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:25:31,809 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:33,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39824#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:25:33,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:33,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:33,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 103 [2022-11-25 22:25:33,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63592956] [2022-11-25 22:25:33,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:33,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-25 22:25:33,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-25 22:25:33,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=11782, Unknown=0, NotChecked=0, Total=13110 [2022-11-25 22:25:33,941 INFO L87 Difference]: Start difference. First operand 169 states and 174 transitions. Second operand has 103 states, 102 states have (on average 2.2745098039215685) internal successors, (232), 98 states have internal predecessors, (232), 46 states have call successors, (47), 1 states have call predecessors, (47), 2 states have return successors, (48), 48 states have call predecessors, (48), 46 states have call successors, (48) [2022-11-25 22:26:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:02,036 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2022-11-25 22:26:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-11-25 22:26:02,036 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 2.2745098039215685) internal successors, (232), 98 states have internal predecessors, (232), 46 states have call successors, (47), 1 states have call predecessors, (47), 2 states have return successors, (48), 48 states have call predecessors, (48), 46 states have call successors, (48) Word has length 130 [2022-11-25 22:26:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:02,037 INFO L225 Difference]: With dead ends: 314 [2022-11-25 22:26:02,038 INFO L226 Difference]: Without dead ends: 138 [2022-11-25 22:26:02,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22026 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=7720, Invalid=68180, Unknown=0, NotChecked=0, Total=75900 [2022-11-25 22:26:02,041 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 722 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 4437 mSolverCounterSat, 427 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 4866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 4437 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:02,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 1213 Invalid, 4866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 4437 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2022-11-25 22:26:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-25 22:26:02,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2022-11-25 22:26:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-25 22:26:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-11-25 22:26:02,250 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 130 [2022-11-25 22:26:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:02,250 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-11-25 22:26:02,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 2.2745098039215685) internal successors, (232), 98 states have internal predecessors, (232), 46 states have call successors, (47), 1 states have call predecessors, (47), 2 states have return successors, (48), 48 states have call predecessors, (48), 46 states have call successors, (48) [2022-11-25 22:26:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-11-25 22:26:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-25 22:26:02,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:02,252 INFO L195 NwaCegarLoop]: trace histogram [18, 16, 16, 16, 16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:02,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:02,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 22:26:02,461 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:02,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1876265245, now seen corresponding path program 42 times [2022-11-25 22:26:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:02,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608575629] [2022-11-25 22:26:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:02,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 16 proven. 693 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-25 22:26:04,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608575629] [2022-11-25 22:26:04,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608575629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206908322] [2022-11-25 22:26:04,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:26:04,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:04,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:04,161 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:04,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-25 22:26:04,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:26:04,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-25 22:26:04,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:05,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:26:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:06,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:26:07,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:26:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 48 proven. 693 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-25 22:26:07,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:07,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:26:07,754 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 31 treesize of output 27 [2022-11-25 22:26:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 16 proven. 693 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-25 22:26:08,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206908322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:08,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178032351] [2022-11-25 22:26:08,132 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:26:08,132 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:08,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:08,132 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:08,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:08,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:08,195 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:26:08,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:26:08,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:08,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:26:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:08,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:26:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:08,690 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:26:08,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:26:08,756 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 20 treesize of output 17 [2022-11-25 22:26:08,842 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:26:08,843 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:11,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41675#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:11,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:11,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:11,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 41, 39] total 78 [2022-11-25 22:26:11,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856790055] [2022-11-25 22:26:11,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:11,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-25 22:26:11,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:11,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-25 22:26:11,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=7597, Unknown=0, NotChecked=0, Total=8010 [2022-11-25 22:26:11,020 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 78 states, 76 states have (on average 2.223684210526316) internal successors, (169), 74 states have internal predecessors, (169), 34 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-25 22:26:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:15,308 INFO L93 Difference]: Finished difference Result 139 states and 142 transitions. [2022-11-25 22:26:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-25 22:26:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 76 states have (on average 2.223684210526316) internal successors, (169), 74 states have internal predecessors, (169), 34 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) Word has length 135 [2022-11-25 22:26:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:15,310 INFO L225 Difference]: With dead ends: 139 [2022-11-25 22:26:15,310 INFO L226 Difference]: Without dead ends: 137 [2022-11-25 22:26:15,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 348 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=925, Invalid=15077, Unknown=0, NotChecked=0, Total=16002 [2022-11-25 22:26:15,312 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 141 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 3825 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 3877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:15,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1346 Invalid, 3877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3825 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 22:26:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-25 22:26:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-11-25 22:26:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-25 22:26:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-11-25 22:26:15,445 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 135 [2022-11-25 22:26:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:15,445 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-11-25 22:26:15,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 76 states have (on average 2.223684210526316) internal successors, (169), 74 states have internal predecessors, (169), 34 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-25 22:26:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-11-25 22:26:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-25 22:26:15,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:15,446 INFO L195 NwaCegarLoop]: trace histogram [18, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:15,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:15,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-25 22:26:15,646 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1108012219, now seen corresponding path program 43 times [2022-11-25 22:26:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:15,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775883568] [2022-11-25 22:26:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:15,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 17 proven. 736 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-25 22:26:17,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:17,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775883568] [2022-11-25 22:26:17,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775883568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362769899] [2022-11-25 22:26:17,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:26:17,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:17,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:17,273 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:17,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-25 22:26:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-25 22:26:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:19,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:26:20,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:26:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 17 proven. 736 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-25 22:26:20,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:21,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:26:21,180 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 24 treesize of output 20 [2022-11-25 22:26:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 17 proven. 736 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-25 22:26:21,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362769899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:21,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [231552251] [2022-11-25 22:26:21,666 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:26:21,666 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:21,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:21,667 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:21,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:21,745 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:26:21,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:26:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:21,795 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:26:21,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:26:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:21,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:26:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:22,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:22,407 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:26:22,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:26:22,533 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 20 treesize of output 17 [2022-11-25 22:26:22,637 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:26:22,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:25,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43069#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:25,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:25,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:25,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 39] total 77 [2022-11-25 22:26:25,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507656423] [2022-11-25 22:26:25,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:25,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-25 22:26:25,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-25 22:26:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=7460, Unknown=0, NotChecked=0, Total=7832 [2022-11-25 22:26:25,162 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 77 states, 75 states have (on average 2.2933333333333334) internal successors, (172), 73 states have internal predecessors, (172), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-25 22:26:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:31,133 INFO L93 Difference]: Finished difference Result 202 states and 208 transitions. [2022-11-25 22:26:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-25 22:26:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 2.2933333333333334) internal successors, (172), 73 states have internal predecessors, (172), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) Word has length 138 [2022-11-25 22:26:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:31,135 INFO L225 Difference]: With dead ends: 202 [2022-11-25 22:26:31,135 INFO L226 Difference]: Without dead ends: 200 [2022-11-25 22:26:31,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 361 SyntacticMatches, 4 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5522 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1023, Invalid=18717, Unknown=0, NotChecked=0, Total=19740 [2022-11-25 22:26:31,137 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 255 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 4604 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 4683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 4604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:31,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1598 Invalid, 4683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 4604 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-25 22:26:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-25 22:26:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 141. [2022-11-25 22:26:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 22:26:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2022-11-25 22:26:31,276 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 138 [2022-11-25 22:26:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:31,276 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2022-11-25 22:26:31,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 2.2933333333333334) internal successors, (172), 73 states have internal predecessors, (172), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-25 22:26:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2022-11-25 22:26:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-25 22:26:31,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:31,278 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:31,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:31,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:31,478 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:31,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:31,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1962835037, now seen corresponding path program 44 times [2022-11-25 22:26:31,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:31,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663380395] [2022-11-25 22:26:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:31,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 346 proven. 422 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-25 22:26:32,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:32,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663380395] [2022-11-25 22:26:32,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663380395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:32,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274457623] [2022-11-25 22:26:32,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:26:32,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:32,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:32,326 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:32,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-25 22:26:34,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-25 22:26:34,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:34,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 22:26:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-25 22:26:34,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-25 22:26:35,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274457623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:35,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572231123] [2022-11-25 22:26:35,764 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:26:35,764 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:35,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:35,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:35,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:35,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:35,844 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:26:35,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:26:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:35,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:26:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:36,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:26:36,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:36,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:36,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:36,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:36,440 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:26:36,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:26:36,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-25 22:26:36,660 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:26:36,661 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:38,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44582#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:38,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:38,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:38,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2022-11-25 22:26:38,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93363316] [2022-11-25 22:26:38,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-25 22:26:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:38,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-25 22:26:38,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=3668, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 22:26:38,440 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 55 states, 55 states have (on average 2.6363636363636362) internal successors, (145), 55 states have internal predecessors, (145), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-25 22:26:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:39,426 INFO L93 Difference]: Finished difference Result 205 states and 211 transitions. [2022-11-25 22:26:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 22:26:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.6363636363636362) internal successors, (145), 55 states have internal predecessors, (145), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 141 [2022-11-25 22:26:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:39,427 INFO L225 Difference]: With dead ends: 205 [2022-11-25 22:26:39,427 INFO L226 Difference]: Without dead ends: 151 [2022-11-25 22:26:39,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 359 SyntacticMatches, 33 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1226, Invalid=5580, Unknown=0, NotChecked=0, Total=6806 [2022-11-25 22:26:39,429 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 191 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:39,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 235 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:26:39,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-25 22:26:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2022-11-25 22:26:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 22:26:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-11-25 22:26:39,597 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 141 [2022-11-25 22:26:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:39,597 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-11-25 22:26:39,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.6363636363636362) internal successors, (145), 55 states have internal predecessors, (145), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-25 22:26:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-11-25 22:26:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 22:26:39,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:39,598 INFO L195 NwaCegarLoop]: trace histogram [19, 17, 17, 17, 17, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:39,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:39,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-25 22:26:39,799 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1314700036, now seen corresponding path program 45 times [2022-11-25 22:26:39,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:39,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720301662] [2022-11-25 22:26:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:39,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 17 proven. 787 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-25 22:26:41,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:41,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720301662] [2022-11-25 22:26:41,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720301662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254333070] [2022-11-25 22:26:41,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:26:41,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:41,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:41,996 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:41,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-25 22:26:42,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:26:42,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:42,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-25 22:26:42,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:44,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:26:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:44,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:26:46,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:26:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 51 proven. 787 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-25 22:26:46,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:46,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:26:46,797 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 31 treesize of output 27 [2022-11-25 22:26:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 17 proven. 787 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-25 22:26:47,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254333070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:47,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [924474585] [2022-11-25 22:26:47,202 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:26:47,202 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:47,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:47,202 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:47,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,284 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:26:47,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:26:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:26:47,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:26:47,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,780 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:26:47,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:26:47,850 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 20 treesize of output 17 [2022-11-25 22:26:47,944 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:26:47,946 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:50,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46062#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:50,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:50,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:50,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 43, 41] total 82 [2022-11-25 22:26:50,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667000259] [2022-11-25 22:26:50,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:50,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-25 22:26:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-25 22:26:50,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=8308, Unknown=0, NotChecked=0, Total=8742 [2022-11-25 22:26:50,401 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 82 states, 80 states have (on average 2.2125) internal successors, (177), 78 states have internal predecessors, (177), 36 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-11-25 22:26:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:55,377 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2022-11-25 22:26:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 22:26:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 2.2125) internal successors, (177), 78 states have internal predecessors, (177), 36 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) Word has length 143 [2022-11-25 22:26:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:55,379 INFO L225 Difference]: With dead ends: 147 [2022-11-25 22:26:55,379 INFO L226 Difference]: Without dead ends: 145 [2022-11-25 22:26:55,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 370 SyntacticMatches, 6 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4982 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=975, Invalid=16581, Unknown=0, NotChecked=0, Total=17556 [2022-11-25 22:26:55,380 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 141 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 4804 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 4854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:55,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1420 Invalid, 4854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4804 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-25 22:26:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-25 22:26:55,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2022-11-25 22:26:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 22:26:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-11-25 22:26:55,548 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 143 [2022-11-25 22:26:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:55,549 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-11-25 22:26:55,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 2.2125) internal successors, (177), 78 states have internal predecessors, (177), 36 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-11-25 22:26:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-11-25 22:26:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-25 22:26:55,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:55,551 INFO L195 NwaCegarLoop]: trace histogram [19, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:55,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-25 22:26:55,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-25 22:26:55,760 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:55,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:55,760 INFO L85 PathProgramCache]: Analyzing trace with hash 427511684, now seen corresponding path program 46 times [2022-11-25 22:26:55,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:55,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33949389] [2022-11-25 22:26:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:55,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 18 proven. 833 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-25 22:26:57,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:57,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33949389] [2022-11-25 22:26:57,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33949389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:57,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800407009] [2022-11-25 22:26:57,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:26:57,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:57,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:57,938 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:57,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-25 22:26:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:58,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-25 22:26:58,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:00,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:27:01,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:27:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 29 proven. 836 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-11-25 22:27:01,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:01,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:27:01,909 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 24 treesize of output 20 [2022-11-25 22:27:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 18 proven. 833 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-25 22:27:02,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800407009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:02,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081116735] [2022-11-25 22:27:02,539 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:27:02,539 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:02,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:02,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:02,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:02,624 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:02,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:02,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:27:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:02,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:27:03,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:03,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:03,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:03,214 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:27:03,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:27:03,294 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 20 treesize of output 17 [2022-11-25 22:27:03,401 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:27:03,403 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:06,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47538#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:27:06,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:06,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:27:06,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 41] total 83 [2022-11-25 22:27:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257254124] [2022-11-25 22:27:06,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-25 22:27:06,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-25 22:27:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=8532, Unknown=0, NotChecked=0, Total=8930 [2022-11-25 22:27:06,215 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 83 states, 80 states have (on average 2.3) internal successors, (184), 78 states have internal predecessors, (184), 37 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (38), 38 states have call predecessors, (38), 37 states have call successors, (38) [2022-11-25 22:27:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:13,194 INFO L93 Difference]: Finished difference Result 213 states and 219 transitions. [2022-11-25 22:27:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-25 22:27:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 80 states have (on average 2.3) internal successors, (184), 78 states have internal predecessors, (184), 37 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (38), 38 states have call predecessors, (38), 37 states have call successors, (38) Word has length 146 [2022-11-25 22:27:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:13,196 INFO L225 Difference]: With dead ends: 213 [2022-11-25 22:27:13,197 INFO L226 Difference]: Without dead ends: 211 [2022-11-25 22:27:13,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 383 SyntacticMatches, 3 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6229 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1090, Invalid=21260, Unknown=0, NotChecked=0, Total=22350 [2022-11-25 22:27:13,199 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 261 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 5044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:13,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1881 Invalid, 5044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 22:27:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-25 22:27:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2022-11-25 22:27:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 22:27:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2022-11-25 22:27:13,445 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 146 [2022-11-25 22:27:13,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:13,445 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2022-11-25 22:27:13,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 80 states have (on average 2.3) internal successors, (184), 78 states have internal predecessors, (184), 37 states have call successors, (38), 1 states have call predecessors, (38), 2 states have return successors, (38), 38 states have call predecessors, (38), 37 states have call successors, (38) [2022-11-25 22:27:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2022-11-25 22:27:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-25 22:27:13,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:13,447 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:13,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:13,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-25 22:27:13,647 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1428056836, now seen corresponding path program 47 times [2022-11-25 22:27:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385311652] [2022-11-25 22:27:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:13,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 393 proven. 474 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-11-25 22:27:14,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385311652] [2022-11-25 22:27:14,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385311652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288158195] [2022-11-25 22:27:14,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:27:14,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:14,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:14,813 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:14,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-25 22:27:16,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-25 22:27:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:27:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 22:27:16,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-11-25 22:27:17,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-11-25 22:27:18,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288158195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:18,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1649465887] [2022-11-25 22:27:18,273 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:27:18,273 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:18,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:18,274 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:18,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:18,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:18,336 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:18,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:18,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:18,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:27:18,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:18,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:27:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:18,838 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:27:18,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:27:18,897 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 20 treesize of output 17 [2022-11-25 22:27:18,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:27:18,980 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:20,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49136#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:27:20,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:20,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:27:20,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2022-11-25 22:27:20,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635915470] [2022-11-25 22:27:20,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:20,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-25 22:27:20,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-25 22:27:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=3999, Unknown=0, NotChecked=0, Total=4830 [2022-11-25 22:27:20,461 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 58 states, 58 states have (on average 2.6379310344827585) internal successors, (153), 58 states have internal predecessors, (153), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-25 22:27:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:21,733 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2022-11-25 22:27:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 22:27:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.6379310344827585) internal successors, (153), 58 states have internal predecessors, (153), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 149 [2022-11-25 22:27:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:21,735 INFO L225 Difference]: With dead ends: 216 [2022-11-25 22:27:21,736 INFO L226 Difference]: Without dead ends: 159 [2022-11-25 22:27:21,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 380 SyntacticMatches, 35 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3177 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1358, Invalid=6124, Unknown=0, NotChecked=0, Total=7482 [2022-11-25 22:27:21,737 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 215 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:21,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 221 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:27:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-25 22:27:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2022-11-25 22:27:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 22:27:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-11-25 22:27:21,991 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 149 [2022-11-25 22:27:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:21,991 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-11-25 22:27:21,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.6379310344827585) internal successors, (153), 58 states have internal predecessors, (153), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-25 22:27:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-11-25 22:27:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-25 22:27:21,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:21,993 INFO L195 NwaCegarLoop]: trace histogram [20, 18, 18, 18, 18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:22,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-25 22:27:22,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-25 22:27:22,203 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1772435389, now seen corresponding path program 48 times [2022-11-25 22:27:22,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:22,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274705108] [2022-11-25 22:27:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:22,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 18 proven. 887 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-25 22:27:24,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:24,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274705108] [2022-11-25 22:27:24,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274705108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:24,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069604040] [2022-11-25 22:27:24,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:27:24,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:24,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:24,548 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:24,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-25 22:27:24,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:27:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:27:24,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-25 22:27:24,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:26,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:27:27,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:27,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:27:28,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:27:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 54 proven. 887 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-25 22:27:29,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:29,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:27:29,453 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 31 treesize of output 27 [2022-11-25 22:27:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 18 proven. 887 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-25 22:27:30,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069604040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:30,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724583797] [2022-11-25 22:27:30,016 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:27:30,016 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:30,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:30,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:30,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:30,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:30,094 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:27:30,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:27:30,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:30,144 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:30,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:30,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:27:30,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:30,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:30,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:30,667 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:27:30,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:27:30,731 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 20 treesize of output 17 [2022-11-25 22:27:30,820 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:27:30,821 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:33,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50700#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:27:33,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:33,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:27:33,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 45, 43] total 88 [2022-11-25 22:27:33,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109918762] [2022-11-25 22:27:33,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:33,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-25 22:27:33,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-25 22:27:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=9440, Unknown=0, NotChecked=0, Total=9900 [2022-11-25 22:27:33,057 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 88 states, 85 states have (on average 2.2470588235294118) internal successors, (191), 83 states have internal predecessors, (191), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2022-11-25 22:27:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:38,809 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-11-25 22:27:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 22:27:38,810 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 85 states have (on average 2.2470588235294118) internal successors, (191), 83 states have internal predecessors, (191), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) Word has length 151 [2022-11-25 22:27:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:38,811 INFO L225 Difference]: With dead ends: 155 [2022-11-25 22:27:38,811 INFO L226 Difference]: Without dead ends: 153 [2022-11-25 22:27:38,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 392 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5579 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1030, Invalid=18710, Unknown=0, NotChecked=0, Total=19740 [2022-11-25 22:27:38,815 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 141 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 5454 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 5503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 5454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:38,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1749 Invalid, 5503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 5454 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 22:27:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-25 22:27:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2022-11-25 22:27:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-25 22:27:39,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-11-25 22:27:39,121 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 151 [2022-11-25 22:27:39,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:39,121 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-11-25 22:27:39,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 85 states have (on average 2.2470588235294118) internal successors, (191), 83 states have internal predecessors, (191), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2022-11-25 22:27:39,122 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-11-25 22:27:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-25 22:27:39,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:39,123 INFO L195 NwaCegarLoop]: trace histogram [20, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:39,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:39,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:39,332 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash -289225243, now seen corresponding path program 49 times [2022-11-25 22:27:39,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:39,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617064061] [2022-11-25 22:27:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:39,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 19 proven. 936 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-25 22:27:41,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:41,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617064061] [2022-11-25 22:27:41,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617064061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:41,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145311768] [2022-11-25 22:27:41,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:27:41,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:41,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:41,950 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:41,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-25 22:27:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-25 22:27:42,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:44,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:27:46,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:27:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 17 proven. 953 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-25 22:27:46,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:47,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:27:47,150 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 24 treesize of output 20 [2022-11-25 22:27:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 19 proven. 936 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-25 22:27:49,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145311768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:49,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963045130] [2022-11-25 22:27:49,369 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:27:49,370 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:49,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:49,370 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:49,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:49,433 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:27:49,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:27:49,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:49,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:27:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:49,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:27:49,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:49,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:49,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:49,927 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:27:49,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:27:50,033 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 20 treesize of output 17 [2022-11-25 22:27:50,130 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:27:50,131 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:52,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52276#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:27:52,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:52,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:27:52,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 45, 43] total 107 [2022-11-25 22:27:52,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958129396] [2022-11-25 22:27:52,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:52,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-25 22:27:52,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-25 22:27:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=13504, Unknown=0, NotChecked=0, Total=14042 [2022-11-25 22:27:52,933 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 107 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 100 states have internal predecessors, (229), 56 states have call successors, (57), 1 states have call predecessors, (57), 2 states have return successors, (59), 59 states have call predecessors, (59), 56 states have call successors, (59) [2022-11-25 22:28:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:04,004 INFO L93 Difference]: Finished difference Result 228 states and 234 transitions. [2022-11-25 22:28:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-25 22:28:04,005 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 100 states have internal predecessors, (229), 56 states have call successors, (57), 1 states have call predecessors, (57), 2 states have return successors, (59), 59 states have call predecessors, (59), 56 states have call successors, (59) Word has length 154 [2022-11-25 22:28:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:04,006 INFO L225 Difference]: With dead ends: 228 [2022-11-25 22:28:04,006 INFO L226 Difference]: Without dead ends: 226 [2022-11-25 22:28:04,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13565 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=2216, Invalid=44656, Unknown=0, NotChecked=0, Total=46872 [2022-11-25 22:28:04,009 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 600 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 6918 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 7210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 6918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:04,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 1819 Invalid, 7210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 6918 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-25 22:28:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-25 22:28:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 157. [2022-11-25 22:28:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 21 states have call successors, (21), 18 states have call predecessors, (21), 18 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 22:28:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 162 transitions. [2022-11-25 22:28:04,246 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 162 transitions. Word has length 154 [2022-11-25 22:28:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:04,246 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 162 transitions. [2022-11-25 22:28:04,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 100 states have internal predecessors, (229), 56 states have call successors, (57), 1 states have call predecessors, (57), 2 states have return successors, (59), 59 states have call predecessors, (59), 56 states have call successors, (59) [2022-11-25 22:28:04,247 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 162 transitions. [2022-11-25 22:28:04,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-25 22:28:04,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:04,248 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:04,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:04,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:04,455 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash -599307005, now seen corresponding path program 50 times [2022-11-25 22:28:04,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:04,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932726859] [2022-11-25 22:28:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:04,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 443 proven. 529 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-25 22:28:05,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:05,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932726859] [2022-11-25 22:28:05,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932726859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:05,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240309614] [2022-11-25 22:28:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:28:05,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:05,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:05,436 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:05,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-25 22:28:06,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-11-25 22:28:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:06,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 22:28:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 495 proven. 477 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-25 22:28:07,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 495 proven. 477 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-25 22:28:08,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240309614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:08,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834452575] [2022-11-25 22:28:08,726 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:28:08,726 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:08,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:08,726 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:08,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:08,788 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:28:08,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:28:08,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:08,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:28:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:08,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:28:09,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:09,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:09,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:09,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:09,258 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:28:09,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:28:09,373 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 20 treesize of output 17 [2022-11-25 22:28:09,453 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:28:09,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:10,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54043#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:10,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:10,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:10,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2022-11-25 22:28:10,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006477439] [2022-11-25 22:28:10,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:10,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-25 22:28:10,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:10,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-25 22:28:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=4344, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 22:28:10,922 INFO L87 Difference]: Start difference. First operand 157 states and 162 transitions. Second operand has 61 states, 61 states have (on average 2.639344262295082) internal successors, (161), 61 states have internal predecessors, (161), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-11-25 22:28:12,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:12,120 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2022-11-25 22:28:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 22:28:12,121 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.639344262295082) internal successors, (161), 61 states have internal predecessors, (161), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 157 [2022-11-25 22:28:12,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:12,121 INFO L225 Difference]: With dead ends: 227 [2022-11-25 22:28:12,122 INFO L226 Difference]: Without dead ends: 167 [2022-11-25 22:28:12,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 401 SyntacticMatches, 37 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3476 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1497, Invalid=6693, Unknown=0, NotChecked=0, Total=8190 [2022-11-25 22:28:12,123 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 251 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:12,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 195 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:28:12,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-25 22:28:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 154. [2022-11-25 22:28:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 21 states have call successors, (21), 18 states have call predecessors, (21), 18 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 22:28:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-11-25 22:28:12,298 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 157 [2022-11-25 22:28:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:12,299 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-11-25 22:28:12,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.639344262295082) internal successors, (161), 61 states have internal predecessors, (161), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-11-25 22:28:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-11-25 22:28:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-25 22:28:12,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:12,300 INFO L195 NwaCegarLoop]: trace histogram [21, 19, 19, 19, 19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:12,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:12,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:12,501 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash -809955420, now seen corresponding path program 51 times [2022-11-25 22:28:12,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:12,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624585954] [2022-11-25 22:28:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:12,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 19 proven. 993 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-25 22:28:14,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624585954] [2022-11-25 22:28:14,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624585954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854231069] [2022-11-25 22:28:14,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:28:14,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:14,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:14,491 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:14,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-25 22:28:15,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:28:15,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:15,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-25 22:28:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:17,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:28:17,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:17,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:28:19,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:28:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 57 proven. 993 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-25 22:28:19,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:19,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:28:19,509 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 31 treesize of output 27 [2022-11-25 22:28:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 19 proven. 993 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-25 22:28:19,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854231069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:19,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1274475696] [2022-11-25 22:28:19,933 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:28:19,933 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:19,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:19,933 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:19,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:19,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:19,997 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:28:19,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:28:20,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:20,036 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:28:20,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:28:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:20,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:28:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:20,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:20,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:20,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:20,507 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:28:20,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:28:20,595 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 20 treesize of output 17 [2022-11-25 22:28:20,673 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:28:20,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:23,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55687#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:23,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:23,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:23,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 47, 45] total 90 [2022-11-25 22:28:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131772487] [2022-11-25 22:28:23,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:23,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-25 22:28:23,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:23,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-25 22:28:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=9832, Unknown=0, NotChecked=0, Total=10302 [2022-11-25 22:28:23,031 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 90 states, 88 states have (on average 2.2613636363636362) internal successors, (199), 86 states have internal predecessors, (199), 40 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) [2022-11-25 22:28:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:28,851 INFO L93 Difference]: Finished difference Result 163 states and 166 transitions. [2022-11-25 22:28:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 22:28:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 88 states have (on average 2.2613636363636362) internal successors, (199), 86 states have internal predecessors, (199), 40 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) Word has length 159 [2022-11-25 22:28:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:28,853 INFO L225 Difference]: With dead ends: 163 [2022-11-25 22:28:28,853 INFO L226 Difference]: Without dead ends: 161 [2022-11-25 22:28:28,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 414 SyntacticMatches, 6 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5917 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1066, Invalid=19814, Unknown=0, NotChecked=0, Total=20880 [2022-11-25 22:28:28,855 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 206 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 5830 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 5889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 5830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:28,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1816 Invalid, 5889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 5830 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-25 22:28:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-25 22:28:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-11-25 22:28:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 21 states have call successors, (21), 19 states have call predecessors, (21), 19 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 22:28:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-11-25 22:28:29,000 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 159 [2022-11-25 22:28:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:29,000 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-11-25 22:28:29,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 88 states have (on average 2.2613636363636362) internal successors, (199), 86 states have internal predecessors, (199), 40 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) [2022-11-25 22:28:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-11-25 22:28:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-25 22:28:29,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:29,001 INFO L195 NwaCegarLoop]: trace histogram [21, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:29,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:29,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:29,202 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:29,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash -250136860, now seen corresponding path program 52 times [2022-11-25 22:28:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327224529] [2022-11-25 22:28:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:29,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1447 backedges. 20 proven. 1045 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-25 22:28:31,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:31,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327224529] [2022-11-25 22:28:31,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327224529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:31,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096961006] [2022-11-25 22:28:31,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:28:31,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:31,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:31,120 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:31,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-25 22:28:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-25 22:28:31,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:33,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:28:35,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:28:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1447 backedges. 33 proven. 1048 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-11-25 22:28:35,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:35,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:28:35,586 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 24 treesize of output 20 [2022-11-25 22:28:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1447 backedges. 20 proven. 1045 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-25 22:28:36,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096961006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1435218785] [2022-11-25 22:28:36,007 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:28:36,008 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:36,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:36,008 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:36,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:36,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:36,071 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:28:36,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:28:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:36,109 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:28:36,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:28:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:36,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:28:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:36,598 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:28:36,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:28:36,699 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 20 treesize of output 17 [2022-11-25 22:28:36,807 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:28:36,808 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:39,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57321#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:39,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:39,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:39,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 45] total 89 [2022-11-25 22:28:39,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313986542] [2022-11-25 22:28:39,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:39,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-25 22:28:39,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:39,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-25 22:28:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=9677, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 22:28:39,466 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 89 states, 87 states have (on average 2.32183908045977) internal successors, (202), 85 states have internal predecessors, (202), 40 states have call successors, (41), 1 states have call predecessors, (41), 2 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) [2022-11-25 22:28:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:46,183 INFO L93 Difference]: Finished difference Result 235 states and 241 transitions. [2022-11-25 22:28:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-25 22:28:46,184 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 87 states have (on average 2.32183908045977) internal successors, (202), 85 states have internal predecessors, (202), 40 states have call successors, (41), 1 states have call predecessors, (41), 2 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) Word has length 162 [2022-11-25 22:28:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:46,185 INFO L225 Difference]: With dead ends: 235 [2022-11-25 22:28:46,185 INFO L226 Difference]: Without dead ends: 233 [2022-11-25 22:28:46,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 427 SyntacticMatches, 4 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7349 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1188, Invalid=24894, Unknown=0, NotChecked=0, Total=26082 [2022-11-25 22:28:46,187 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 301 mSDsluCounter, 2168 mSDsCounter, 0 mSdLazyCounter, 6512 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 6609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:46,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 2215 Invalid, 6609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6512 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-25 22:28:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-25 22:28:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 165. [2022-11-25 22:28:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 22 states have call successors, (22), 19 states have call predecessors, (22), 19 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-25 22:28:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 170 transitions. [2022-11-25 22:28:46,427 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 170 transitions. Word has length 162 [2022-11-25 22:28:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:46,427 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 170 transitions. [2022-11-25 22:28:46,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 87 states have (on average 2.32183908045977) internal successors, (202), 85 states have internal predecessors, (202), 40 states have call successors, (41), 1 states have call predecessors, (41), 2 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) [2022-11-25 22:28:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 170 transitions. [2022-11-25 22:28:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-25 22:28:46,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:46,429 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:46,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:46,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-25 22:28:46,635 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash -53426268, now seen corresponding path program 53 times [2022-11-25 22:28:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:46,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118056926] [2022-11-25 22:28:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:46,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 496 proven. 587 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-25 22:28:47,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:47,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118056926] [2022-11-25 22:28:47,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118056926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:47,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557724373] [2022-11-25 22:28:47,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:28:47,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:47,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:47,874 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:47,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-25 22:28:50,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-11-25 22:28:50,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:50,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 22:28:50,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 551 proven. 532 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-25 22:28:51,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 551 proven. 532 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-25 22:28:51,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557724373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:51,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931807488] [2022-11-25 22:28:51,953 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:28:51,953 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:51,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:51,953 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:51,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:51,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:52,020 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:28:52,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:28:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:52,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:28:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:52,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:28:52,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:52,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:52,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:52,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:52,532 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:28:52,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:28:52,625 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 20 treesize of output 17 [2022-11-25 22:28:52,716 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:28:52,717 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:54,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59089#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:54,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:54,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:54,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 64 [2022-11-25 22:28:54,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058315355] [2022-11-25 22:28:54,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:54,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-25 22:28:54,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-25 22:28:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4703, Unknown=0, NotChecked=0, Total=5700 [2022-11-25 22:28:54,513 INFO L87 Difference]: Start difference. First operand 165 states and 170 transitions. Second operand has 64 states, 64 states have (on average 2.640625) internal successors, (169), 64 states have internal predecessors, (169), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 22:28:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:55,804 INFO L93 Difference]: Finished difference Result 238 states and 244 transitions. [2022-11-25 22:28:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 22:28:55,804 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.640625) internal successors, (169), 64 states have internal predecessors, (169), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 165 [2022-11-25 22:28:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:55,805 INFO L225 Difference]: With dead ends: 238 [2022-11-25 22:28:55,805 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 22:28:55,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 422 SyntacticMatches, 39 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1643, Invalid=7287, Unknown=0, NotChecked=0, Total=8930 [2022-11-25 22:28:55,806 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 187 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:55,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 275 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:28:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 22:28:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2022-11-25 22:28:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 22 states have call successors, (22), 19 states have call predecessors, (22), 19 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-25 22:28:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-11-25 22:28:56,061 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 165 [2022-11-25 22:28:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:56,062 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-11-25 22:28:56,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.640625) internal successors, (169), 64 states have internal predecessors, (169), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 22:28:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-11-25 22:28:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-25 22:28:56,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:56,063 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 20, 20, 20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:56,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:56,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-25 22:28:56,271 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:56,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1631366749, now seen corresponding path program 54 times [2022-11-25 22:28:56,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:56,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478190537] [2022-11-25 22:28:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 20 proven. 1105 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-25 22:28:58,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:58,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478190537] [2022-11-25 22:28:58,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478190537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:58,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218058317] [2022-11-25 22:28:58,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:28:58,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:58,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:58,468 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:58,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-25 22:28:59,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:28:59,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-25 22:28:59,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:01,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:29:01,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:01,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:29:04,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:29:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 60 proven. 1105 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-25 22:29:04,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:04,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:29:04,519 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 31 treesize of output 27 [2022-11-25 22:29:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 20 proven. 1105 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-25 22:29:05,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218058317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:05,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237768473] [2022-11-25 22:29:05,044 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:29:05,044 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:05,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:05,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:05,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:05,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:05,115 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:29:05,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:29:05,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:05,160 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:29:05,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:29:05,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:05,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:29:05,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:05,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:05,693 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:29:05,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:29:05,822 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 20 treesize of output 17 [2022-11-25 22:29:05,923 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:29:05,924 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:29:08,428 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60815#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:29:08,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:29:08,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:29:08,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 49, 47] total 94 [2022-11-25 22:29:08,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844501382] [2022-11-25 22:29:08,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:29:08,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-25 22:29:08,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:08,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-25 22:29:08,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=10641, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 22:29:08,431 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 94 states, 92 states have (on average 2.2717391304347827) internal successors, (209), 90 states have internal predecessors, (209), 42 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2022-11-25 22:29:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:14,890 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2022-11-25 22:29:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-25 22:29:14,891 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 2.2717391304347827) internal successors, (209), 90 states have internal predecessors, (209), 42 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) Word has length 167 [2022-11-25 22:29:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:14,892 INFO L225 Difference]: With dead ends: 171 [2022-11-25 22:29:14,892 INFO L226 Difference]: Without dead ends: 169 [2022-11-25 22:29:14,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 436 SyntacticMatches, 6 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6415 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1113, Invalid=21537, Unknown=0, NotChecked=0, Total=22650 [2022-11-25 22:29:14,895 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 154 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 6611 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 6667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 6611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:14,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 2207 Invalid, 6667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 6611 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-25 22:29:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-25 22:29:15,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2022-11-25 22:29:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 22 states have call successors, (22), 20 states have call predecessors, (22), 20 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-25 22:29:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-11-25 22:29:15,106 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 167 [2022-11-25 22:29:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:15,107 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-11-25 22:29:15,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 2.2717391304347827) internal successors, (209), 90 states have internal predecessors, (209), 42 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2022-11-25 22:29:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-11-25 22:29:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-25 22:29:15,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:15,109 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:15,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-25 22:29:15,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:15,311 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:29:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1808613509, now seen corresponding path program 55 times [2022-11-25 22:29:15,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:15,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927185021] [2022-11-25 22:29:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:15,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 21 proven. 1160 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-25 22:29:17,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927185021] [2022-11-25 22:29:17,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927185021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512645548] [2022-11-25 22:29:17,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:29:17,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:17,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:17,495 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:17,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-25 22:29:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:17,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-25 22:29:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:19,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:29:21,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:29:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 38 proven. 1160 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-11-25 22:29:21,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:22,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:29:22,259 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 24 treesize of output 20 [2022-11-25 22:29:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 21 proven. 1160 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-25 22:29:22,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512645548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [547575849] [2022-11-25 22:29:22,822 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:29:22,823 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:22,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:22,823 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:22,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:22,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:22,894 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:29:22,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:29:22,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:22,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:29:23,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:23,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:29:23,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:23,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:23,499 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:29:23,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:29:23,578 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 20 treesize of output 17 [2022-11-25 22:29:23,677 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:29:23,679 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:29:26,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '62529#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:29:26,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:29:26,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:29:26,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 47] total 93 [2022-11-25 22:29:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523669715] [2022-11-25 22:29:26,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:29:26,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-25 22:29:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-25 22:29:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=10480, Unknown=0, NotChecked=0, Total=10920 [2022-11-25 22:29:26,126 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 93 states, 91 states have (on average 2.32967032967033) internal successors, (212), 89 states have internal predecessors, (212), 42 states have call successors, (43), 1 states have call predecessors, (43), 2 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2022-11-25 22:29:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:33,855 INFO L93 Difference]: Finished difference Result 246 states and 252 transitions. [2022-11-25 22:29:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-25 22:29:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 91 states have (on average 2.32967032967033) internal successors, (212), 89 states have internal predecessors, (212), 42 states have call successors, (43), 1 states have call predecessors, (43), 2 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) Word has length 170 [2022-11-25 22:29:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:33,857 INFO L225 Difference]: With dead ends: 246 [2022-11-25 22:29:33,857 INFO L226 Difference]: Without dead ends: 244 [2022-11-25 22:29:33,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 449 SyntacticMatches, 4 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8016 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1243, Invalid=27149, Unknown=0, NotChecked=0, Total=28392 [2022-11-25 22:29:33,860 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 362 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 6578 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 2538 SdHoareTripleChecker+Invalid, 6688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 6578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:33,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 2538 Invalid, 6688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 6578 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-25 22:29:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-25 22:29:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 173. [2022-11-25 22:29:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 23 states have call successors, (23), 20 states have call predecessors, (23), 20 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-25 22:29:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 178 transitions. [2022-11-25 22:29:34,093 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 178 transitions. Word has length 170 [2022-11-25 22:29:34,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:34,094 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 178 transitions. [2022-11-25 22:29:34,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 91 states have (on average 2.32967032967033) internal successors, (212), 89 states have internal predecessors, (212), 42 states have call successors, (43), 1 states have call predecessors, (43), 2 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2022-11-25 22:29:34,094 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 178 transitions. [2022-11-25 22:29:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-25 22:29:34,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:34,095 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:34,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-25 22:29:34,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-25 22:29:34,303 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:29:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:34,303 INFO L85 PathProgramCache]: Analyzing trace with hash 45829731, now seen corresponding path program 56 times [2022-11-25 22:29:34,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:34,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603022764] [2022-11-25 22:29:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:34,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 552 proven. 648 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-11-25 22:29:35,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:35,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603022764] [2022-11-25 22:29:35,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603022764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:35,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236391312] [2022-11-25 22:29:35,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:29:35,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:35,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:35,500 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:35,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-25 22:29:37,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-25 22:29:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:29:37,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 22:29:37,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 610 proven. 590 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-11-25 22:29:38,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 610 proven. 590 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-11-25 22:29:39,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236391312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280725591] [2022-11-25 22:29:39,845 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:29:39,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:39,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:39,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:39,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:39,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:39,905 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:29:39,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:29:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:39,944 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:29:39,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:29:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:40,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:29:40,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:40,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:40,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:40,417 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:29:40,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:29:40,475 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 20 treesize of output 17 [2022-11-25 22:29:40,557 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:29:40,560 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:29:42,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64382#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:29:42,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:29:42,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:29:42,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 67 [2022-11-25 22:29:42,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58053385] [2022-11-25 22:29:42,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:29:42,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-25 22:29:42,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:42,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-25 22:29:42,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=5076, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 22:29:42,222 INFO L87 Difference]: Start difference. First operand 173 states and 178 transitions. Second operand has 67 states, 67 states have (on average 2.6417910447761193) internal successors, (177), 67 states have internal predecessors, (177), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-25 22:29:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:43,677 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2022-11-25 22:29:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 22:29:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.6417910447761193) internal successors, (177), 67 states have internal predecessors, (177), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 173 [2022-11-25 22:29:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:43,679 INFO L225 Difference]: With dead ends: 249 [2022-11-25 22:29:43,679 INFO L226 Difference]: Without dead ends: 183 [2022-11-25 22:29:43,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 443 SyntacticMatches, 41 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4113 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1796, Invalid=7906, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 22:29:43,680 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 297 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:43,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 220 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:29:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-25 22:29:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 170. [2022-11-25 22:29:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 23 states have call successors, (23), 20 states have call predecessors, (23), 20 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-25 22:29:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-11-25 22:29:43,890 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 173 [2022-11-25 22:29:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:43,891 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-11-25 22:29:43,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.6417910447761193) internal successors, (177), 67 states have internal predecessors, (177), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-25 22:29:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-11-25 22:29:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-25 22:29:43,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:43,892 INFO L195 NwaCegarLoop]: trace histogram [23, 21, 21, 21, 21, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:43,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-25 22:29:44,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:44,092 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:29:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1070476356, now seen corresponding path program 57 times [2022-11-25 22:29:44,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:44,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815597704] [2022-11-25 22:29:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 21 proven. 1223 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-25 22:29:46,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815597704] [2022-11-25 22:29:46,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815597704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:46,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956698199] [2022-11-25 22:29:46,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:29:46,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:46,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:46,270 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:46,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-25 22:29:46,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:29:46,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:29:46,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-25 22:29:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:49,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:29:49,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:49,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:29:52,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:29:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 63 proven. 1223 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-25 22:29:52,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:52,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:29:52,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-25 22:29:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 21 proven. 1223 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-25 22:29:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956698199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501789548] [2022-11-25 22:29:53,107 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:29:53,107 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:53,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:53,107 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:53,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:53,178 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:29:53,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:29:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:53,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:29:53,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:53,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:29:53,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:53,709 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-25 22:29:53,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-25 22:29:53,797 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 20 treesize of output 17 [2022-11-25 22:29:53,876 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:29:53,877 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:29:56,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66190#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:29:56,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:29:56,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:29:56,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 51, 49] total 98 [2022-11-25 22:29:56,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392992994] [2022-11-25 22:29:56,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:29:56,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-25 22:29:56,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:56,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-25 22:29:56,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=11482, Unknown=0, NotChecked=0, Total=11990 [2022-11-25 22:29:56,101 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 98 states, 96 states have (on average 2.28125) internal successors, (219), 94 states have internal predecessors, (219), 44 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) [2022-11-25 22:30:02,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:02,042 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2022-11-25 22:30:02,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-25 22:30:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 96 states have (on average 2.28125) internal successors, (219), 94 states have internal predecessors, (219), 44 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) Word has length 175 [2022-11-25 22:30:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:02,043 INFO L225 Difference]: With dead ends: 179 [2022-11-25 22:30:02,043 INFO L226 Difference]: Without dead ends: 177 [2022-11-25 22:30:02,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 458 SyntacticMatches, 6 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6933 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1160, Invalid=23332, Unknown=0, NotChecked=0, Total=24492 [2022-11-25 22:30:02,045 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 174 mSDsluCounter, 2082 mSDsCounter, 0 mSdLazyCounter, 6877 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2128 SdHoareTripleChecker+Invalid, 6941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 6877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:02,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2128 Invalid, 6941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 6877 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-25 22:30:02,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-25 22:30:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2022-11-25 22:30:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-25 22:30:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-11-25 22:30:02,227 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 175 [2022-11-25 22:30:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:02,227 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-11-25 22:30:02,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 96 states have (on average 2.28125) internal successors, (219), 94 states have internal predecessors, (219), 44 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) [2022-11-25 22:30:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-11-25 22:30:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-25 22:30:02,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:02,229 INFO L195 NwaCegarLoop]: trace histogram [23, 21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:02,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-25 22:30:02,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:02,429 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:30:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash 434460228, now seen corresponding path program 58 times [2022-11-25 22:30:02,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:02,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022033770] [2022-11-25 22:30:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:02,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 22 proven. 1281 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-25 22:30:04,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:04,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022033770] [2022-11-25 22:30:04,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022033770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:30:04,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300000018] [2022-11-25 22:30:04,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:30:04,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:30:04,700 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:30:04,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-25 22:30:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-25 22:30:05,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:07,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:30:09,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:30:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 36 proven. 1285 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-11-25 22:30:09,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:30:10,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-25 22:30:10,060 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 24 treesize of output 20 [2022-11-25 22:30:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 22 proven. 1281 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-25 22:30:10,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300000018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:30:10,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243650758] [2022-11-25 22:30:10,673 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:30:10,673 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:30:10,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:30:10,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:30:10,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:30:10,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:10,746 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:30:10,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:30:10,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:10,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:30:10,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:10,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:30:11,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:11,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:11,320 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:30:11,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:30:11,388 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 20 treesize of output 17 [2022-11-25 22:30:11,478 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:30:11,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:30:13,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67984#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:30:13,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:30:13,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:30:13,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 49] total 97 [2022-11-25 22:30:13,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393159509] [2022-11-25 22:30:13,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:30:13,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-25 22:30:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-25 22:30:13,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=11315, Unknown=0, NotChecked=0, Total=11772 [2022-11-25 22:30:13,767 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 97 states, 95 states have (on average 2.336842105263158) internal successors, (222), 93 states have internal predecessors, (222), 44 states have call successors, (45), 1 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) [2022-11-25 22:30:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:22,608 INFO L93 Difference]: Finished difference Result 257 states and 263 transitions. [2022-11-25 22:30:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-25 22:30:22,608 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 95 states have (on average 2.336842105263158) internal successors, (222), 93 states have internal predecessors, (222), 44 states have call successors, (45), 1 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) Word has length 178 [2022-11-25 22:30:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:22,610 INFO L225 Difference]: With dead ends: 257 [2022-11-25 22:30:22,610 INFO L226 Difference]: Without dead ends: 255 [2022-11-25 22:30:22,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 471 SyntacticMatches, 4 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8712 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1298, Invalid=29502, Unknown=0, NotChecked=0, Total=30800 [2022-11-25 22:30:22,612 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 317 mSDsluCounter, 2668 mSDsCounter, 0 mSdLazyCounter, 8051 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 2719 SdHoareTripleChecker+Invalid, 8156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 8051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:22,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 2719 Invalid, 8156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 8051 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-25 22:30:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-25 22:30:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 181. [2022-11-25 22:30:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 22:30:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 186 transitions. [2022-11-25 22:30:22,836 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 186 transitions. Word has length 178 [2022-11-25 22:30:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:22,836 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 186 transitions. [2022-11-25 22:30:22,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 95 states have (on average 2.336842105263158) internal successors, (222), 93 states have internal predecessors, (222), 44 states have call successors, (45), 1 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) [2022-11-25 22:30:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 186 transitions. [2022-11-25 22:30:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-25 22:30:22,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:22,839 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:22,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-25 22:30:23,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-11-25 22:30:23,051 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:30:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2021266364, now seen corresponding path program 59 times [2022-11-25 22:30:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:23,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185824557] [2022-11-25 22:30:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:23,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 611 proven. 712 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:30:24,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:24,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185824557] [2022-11-25 22:30:24,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185824557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:30:24,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977227451] [2022-11-25 22:30:24,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:30:24,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:24,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:30:24,471 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:30:24,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-25 22:30:26,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-25 22:30:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:30:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 22:30:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 672 proven. 651 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:30:28,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:30:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 672 proven. 651 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:30:29,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977227451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:30:29,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297299756] [2022-11-25 22:30:29,049 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:30:29,049 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:30:29,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:30:29,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:30:29,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:30:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:29,120 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:30:29,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:30:29,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:29,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 22:30:29,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:29,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:30:29,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:29,584 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:30:29,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:30:29,648 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 20 treesize of output 17 [2022-11-25 22:30:29,764 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:30:29,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:30:31,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69922#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:30:31,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:30:31,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:30:31,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 70 [2022-11-25 22:30:31,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030392521] [2022-11-25 22:30:31,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:30:31,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-25 22:30:31,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:31,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-25 22:30:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=5463, Unknown=0, NotChecked=0, Total=6642 [2022-11-25 22:30:31,631 INFO L87 Difference]: Start difference. First operand 181 states and 186 transitions. Second operand has 70 states, 70 states have (on average 2.642857142857143) internal successors, (185), 70 states have internal predecessors, (185), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-11-25 22:30:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:33,124 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2022-11-25 22:30:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 22:30:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.642857142857143) internal successors, (185), 70 states have internal predecessors, (185), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 181 [2022-11-25 22:30:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:33,126 INFO L225 Difference]: With dead ends: 260 [2022-11-25 22:30:33,126 INFO L226 Difference]: Without dead ends: 191 [2022-11-25 22:30:33,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 464 SyntacticMatches, 43 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4451 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1956, Invalid=8550, Unknown=0, NotChecked=0, Total=10506 [2022-11-25 22:30:33,127 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 251 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:33,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 267 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:30:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-25 22:30:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2022-11-25 22:30:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 22:30:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-11-25 22:30:33,335 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 181 [2022-11-25 22:30:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:33,336 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-11-25 22:30:33,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.642857142857143) internal successors, (185), 70 states have internal predecessors, (185), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-11-25 22:30:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-11-25 22:30:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-25 22:30:33,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:33,338 INFO L195 NwaCegarLoop]: trace histogram [24, 22, 22, 22, 22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:33,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-25 22:30:33,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:33,538 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:30:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1591350019, now seen corresponding path program 60 times [2022-11-25 22:30:33,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:33,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700955968] [2022-11-25 22:30:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:33,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 22 proven. 1347 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-11-25 22:30:35,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:35,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700955968] [2022-11-25 22:30:35,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700955968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:30:35,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549745147] [2022-11-25 22:30:35,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:30:35,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:35,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:30:35,978 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:30:35,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-25 22:30:36,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:30:36,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:30:36,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-25 22:30:36,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:38,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:30:38,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:38,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 22:30:41,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:30:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 66 proven. 1347 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-25 22:30:41,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:30:41,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-25 22:30:41,882 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 31 treesize of output 27 [2022-11-25 22:30:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 22 proven. 1347 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-11-25 22:30:42,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549745147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:30:42,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855084197] [2022-11-25 22:30:42,430 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:30:42,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:30:42,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:30:42,430 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:30:42,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:30:42,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:42,487 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 22:30:42,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-25 22:30:42,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:42,525 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 22:30:42,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 22:30:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:42,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-25 22:30:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:42,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:30:42,998 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-25 22:30:42,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-25 22:30:43,062 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 20 treesize of output 17 [2022-11-25 22:30:43,152 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-25 22:30:43,153 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:30:45,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71812#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:30:45,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:30:45,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:30:45,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 53, 51] total 102 [2022-11-25 22:30:45,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392362627] [2022-11-25 22:30:45,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:30:45,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-25 22:30:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-25 22:30:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=12355, Unknown=0, NotChecked=0, Total=12882 [2022-11-25 22:30:45,609 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 102 states, 100 states have (on average 2.29) internal successors, (229), 98 states have internal predecessors, (229), 46 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2022-11-25 22:30:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:52,522 INFO L93 Difference]: Finished difference Result 187 states and 190 transitions. [2022-11-25 22:30:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-25 22:30:52,523 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 100 states have (on average 2.29) internal successors, (229), 98 states have internal predecessors, (229), 46 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) Word has length 183 [2022-11-25 22:30:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:52,524 INFO L225 Difference]: With dead ends: 187 [2022-11-25 22:30:52,524 INFO L226 Difference]: Without dead ends: 185 [2022-11-25 22:30:52,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 480 SyntacticMatches, 6 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7471 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1207, Invalid=25199, Unknown=0, NotChecked=0, Total=26406 [2022-11-25 22:30:52,526 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 125 mSDsluCounter, 2965 mSDsCounter, 0 mSdLazyCounter, 8208 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 8268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 8208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:52,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 3013 Invalid, 8268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 8208 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-25 22:30:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-25 22:30:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-11-25 22:30:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 24 states have call successors, (24), 22 states have call predecessors, (24), 22 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 22:30:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-11-25 22:30:52,702 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 183 [2022-11-25 22:30:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:52,703 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-11-25 22:30:52,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 100 states have (on average 2.29) internal successors, (229), 98 states have internal predecessors, (229), 46 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2022-11-25 22:30:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-11-25 22:30:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-25 22:30:52,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:52,704 INFO L195 NwaCegarLoop]: trace histogram [24, 22, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:52,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-25 22:30:52,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:52,911 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:30:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash 64914213, now seen corresponding path program 61 times [2022-11-25 22:30:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:52,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106526757] [2022-11-25 22:30:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 23 proven. 1408 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-11-25 22:30:55,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:55,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106526757] [2022-11-25 22:30:55,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106526757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:30:55,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534703421] [2022-11-25 22:30:55,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:30:55,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:30:55,430 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:30:55,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2221202c-8186-4164-bd58-ddd47a84d03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-25 22:30:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:55,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-25 22:30:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:58,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9