./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/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_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/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_17d18024-9cdd-4416-9b76-9fdf407a4efe/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 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a --- 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 23:21:52,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:21:52,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:21:52,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:21:52,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:21:52,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:21:52,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:21:52,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:21:52,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:21:52,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:21:52,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:21:52,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:21:52,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:21:52,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:21:52,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:21:52,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:21:52,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:21:52,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:21:52,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:21:52,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:21:52,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:21:52,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:21:52,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:21:52,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:21:52,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:21:52,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:21:52,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:21:52,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:21:52,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:21:52,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:21:52,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:21:52,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:21:52,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:21:52,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:21:52,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:21:52,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:21:52,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:21:52,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:21:52,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:21:52,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:21:52,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:21:52,579 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:21:52,619 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:21:52,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:21:52,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:21:52,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:21:52,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:21:52,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:21:52,626 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:21:52,627 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:21:52,627 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:21:52,627 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:21:52,628 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:21:52,629 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:21:52,629 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:21:52,629 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:21:52,629 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:21:52,630 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:21:52,630 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:21:52,630 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:21:52,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:21:52,631 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:21:52,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:21:52,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:21:52,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:21:52,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:21:52,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:21:52,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:21:52,634 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:21:52,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:21:52,634 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:21:52,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:21:52,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:21:52,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:21:52,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:21:52,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:21:52,637 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:21:52,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:21:52,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:21:52,637 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:21:52,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:21:52,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:21:52,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:21:52,639 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_17d18024-9cdd-4416-9b76-9fdf407a4efe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a [2022-11-25 23:21:52,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:21:53,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:21:53,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:21:53,006 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:21:53,007 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:21:53,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2022-11-25 23:21:56,070 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:21:56,257 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:21:56,258 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2022-11-25 23:21:56,272 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/data/ed545f8ea/41de8e2c640c4b868cf186fa4a4a8279/FLAGc7e4de312 [2022-11-25 23:21:56,294 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/data/ed545f8ea/41de8e2c640c4b868cf186fa4a4a8279 [2022-11-25 23:21:56,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:21:56,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:21:56,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:21:56,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:21:56,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:21:56,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a34cdc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56, skipping insertion in model container [2022-11-25 23:21:56,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:21:56,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:21:56,525 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_17d18024-9cdd-4416-9b76-9fdf407a4efe/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2022-11-25 23:21:56,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:21:56,567 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:21:56,581 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_17d18024-9cdd-4416-9b76-9fdf407a4efe/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2022-11-25 23:21:56,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:21:56,627 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:21:56,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56 WrapperNode [2022-11-25 23:21:56,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:21:56,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:21:56,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:21:56,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:21:56,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,688 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-11-25 23:21:56,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:21:56,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:21:56,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:21:56,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:21:56,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,733 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:21:56,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:21:56,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:21:56,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:21:56,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (1/1) ... [2022-11-25 23:21:56,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:21:56,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:56,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:21:56,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:21:56,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:21:56,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:21:56,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:21:56,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:21:56,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:21:56,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:21:56,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:21:56,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:21:56,905 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:21:56,907 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:21:57,093 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:21:57,138 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:21:57,138 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 23:21:57,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:21:57 BoogieIcfgContainer [2022-11-25 23:21:57,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:21:57,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:21:57,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:21:57,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:21:57,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:21:56" (1/3) ... [2022-11-25 23:21:57,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7741241d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:21:57, skipping insertion in model container [2022-11-25 23:21:57,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:56" (2/3) ... [2022-11-25 23:21:57,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7741241d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:21:57, skipping insertion in model container [2022-11-25 23:21:57,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:21:57" (3/3) ... [2022-11-25 23:21:57,149 INFO L112 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2022-11-25 23:21:57,169 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:21:57,169 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:21:57,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:21:57,258 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;@77323c05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:21:57,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:21:57,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:21:57,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:57,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:21:57,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash -199734736, now seen corresponding path program 1 times [2022-11-25 23:21:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:57,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477685128] [2022-11-25 23:21:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:57,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:57,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:21:57,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602760647] [2022-11-25 23:21:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:57,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:57,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:57,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:57,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:21:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:21:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:57,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:57,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:57,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477685128] [2022-11-25 23:21:57,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:21:57,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602760647] [2022-11-25 23:21:57,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602760647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:57,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:57,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:21:57,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580231195] [2022-11-25 23:21:57,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:57,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:57,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:57,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:57,695 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:57,766 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-25 23:21:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:21:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:57,777 INFO L225 Difference]: With dead ends: 23 [2022-11-25 23:21:57,778 INFO L226 Difference]: Without dead ends: 13 [2022-11-25 23:21:57,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:21:57,786 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:57,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:21:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-25 23:21:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-25 23:21:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-25 23:21:57,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2022-11-25 23:21:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:57,823 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-25 23:21:57,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-25 23:21:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:21:57,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:57,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:21:57,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:21:58,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:58,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:58,032 INFO L85 PathProgramCache]: Analyzing trace with hash -692344784, now seen corresponding path program 1 times [2022-11-25 23:21:58,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:58,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162180758] [2022-11-25 23:21:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:58,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:58,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:21:58,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74676330] [2022-11-25 23:21:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:58,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:58,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:58,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:21:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:58,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:21:58,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:58,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:58,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:58,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162180758] [2022-11-25 23:21:58,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:21:58,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74676330] [2022-11-25 23:21:58,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74676330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:58,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:58,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:21:58,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475186023] [2022-11-25 23:21:58,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:58,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:21:58,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:58,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:21:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:21:58,178 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:58,239 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-25 23:21:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:21:58,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:21:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:58,241 INFO L225 Difference]: With dead ends: 31 [2022-11-25 23:21:58,241 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 23:21:58,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 23:21:58,243 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:58,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 9 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:21:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 23:21:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-11-25 23:21:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-25 23:21:58,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2022-11-25 23:21:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:58,249 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-25 23:21:58,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-25 23:21:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:21:58,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:58,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:21:58,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:58,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:58,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2131955188, now seen corresponding path program 1 times [2022-11-25 23:21:58,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:58,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836920615] [2022-11-25 23:21:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:58,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:58,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:21:58,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198578826] [2022-11-25 23:21:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:58,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:58,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:58,473 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:58,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:21:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:21:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:58,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:58,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836920615] [2022-11-25 23:21:58,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:21:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198578826] [2022-11-25 23:21:58,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198578826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:58,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809956787] [2022-11-25 23:21:58,699 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:21:58,699 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:21:58,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:21:58,707 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:21:58,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:21:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:58,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:58,929 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-25 23:21:58,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-25 23:21:59,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:59,192 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:21:59,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:21:59,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:59,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:59,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-25 23:21:59,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:59,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:59,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:00,010 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:22:00,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:22:00,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:00,277 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:00,279 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:00,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:00,355 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:00,356 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:00,626 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:22:01,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [809956787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:22:01,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:22:01,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-25 23:22:01,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424320211] [2022-11-25 23:22:01,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:22:01,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:22:01,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:22:01,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:22:01,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:22:01,184 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:01,645 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-25 23:22:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:22:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:22:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:01,647 INFO L225 Difference]: With dead ends: 31 [2022-11-25 23:22:01,647 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 23:22:01,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:22:01,648 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:01,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:22:01,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 23:22:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-11-25 23:22:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-25 23:22:01,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-25 23:22:01,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:01,671 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-25 23:22:01,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:01,671 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-25 23:22:01,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:22:01,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:01,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:01,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:01,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:01,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:22:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1240462748, now seen corresponding path program 1 times [2022-11-25 23:22:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:22:01,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249755649] [2022-11-25 23:22:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:01,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:22:01,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:22:01,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706356657] [2022-11-25 23:22:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:01,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:01,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:22:01,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:22:01,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:22:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:01,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:22:01,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:22:02,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:22:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:22:02,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:22:02,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249755649] [2022-11-25 23:22:02,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:22:02,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706356657] [2022-11-25 23:22:02,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706356657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:22:02,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122342935] [2022-11-25 23:22:02,045 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:22:02,045 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:22:02,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:22:02,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:22:02,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:22:02,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,212 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:22:02,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:22:02,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-25 23:22:02,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-25 23:22:02,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:02,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:02,813 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:22:02,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:22:02,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:02,977 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:02,978 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:03,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,031 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:03,032 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:03,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,292 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-25 23:22:03,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-25 23:22:03,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,402 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:03,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:03,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,543 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:03,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:03,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,677 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:03,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:03,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,864 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:03,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:03,959 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:03,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:03,988 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:22:04,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '426#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 23:22:04,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:22:04,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:22:04,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-25 23:22:04,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767955301] [2022-11-25 23:22:04,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:22:04,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:22:04,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:22:04,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:22:04,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:22:04,900 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:05,043 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-11-25 23:22:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:22:05,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:22:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:05,044 INFO L225 Difference]: With dead ends: 52 [2022-11-25 23:22:05,044 INFO L226 Difference]: Without dead ends: 38 [2022-11-25 23:22:05,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:22:05,046 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:05,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 15 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:22:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-25 23:22:05,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-25 23:22:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-25 23:22:05,070 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2022-11-25 23:22:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:05,070 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-25 23:22:05,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-25 23:22:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 23:22:05,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:05,072 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:05,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:05,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:05,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:22:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:05,278 INFO L85 PathProgramCache]: Analyzing trace with hash -841573940, now seen corresponding path program 2 times [2022-11-25 23:22:05,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:22:05,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756644608] [2022-11-25 23:22:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:05,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:22:05,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:22:05,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707258196] [2022-11-25 23:22:05,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:22:05,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:22:05,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:22:05,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:22:05,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:22:05,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:22:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:22:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:22:05,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:22:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:22:05,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:22:05,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756644608] [2022-11-25 23:22:05,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:22:05,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707258196] [2022-11-25 23:22:05,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707258196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:22:05,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1185571412] [2022-11-25 23:22:05,453 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:22:05,453 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:22:05,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:22:05,453 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:22:05,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:22:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:05,602 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:22:05,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:22:05,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:05,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:05,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-25 23:22:05,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:05,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-25 23:22:06,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:06,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:06,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,069 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:22:06,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:22:06,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,222 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:06,223 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:06,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,276 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:06,276 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:06,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,493 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:06,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:06,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,582 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:06,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:06,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,710 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:06,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:06,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,803 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:06,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:06,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:06,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:07,020 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-25 23:22:07,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-25 23:22:07,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:07,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:07,142 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:07,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:07,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:22:08,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '693#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 23:22:08,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:22:08,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:22:08,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-25 23:22:08,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095952118] [2022-11-25 23:22:08,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:22:08,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:22:08,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:22:08,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:22:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:22:08,119 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:08,218 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-11-25 23:22:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:22:08,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-25 23:22:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:08,221 INFO L225 Difference]: With dead ends: 72 [2022-11-25 23:22:08,221 INFO L226 Difference]: Without dead ends: 49 [2022-11-25 23:22:08,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:22:08,228 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:08,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:22:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-25 23:22:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-25 23:22:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-11-25 23:22:08,268 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2022-11-25 23:22:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:08,268 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-11-25 23:22:08,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-11-25 23:22:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 23:22:08,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:08,270 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:08,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:08,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:08,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:22:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:08,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1454414132, now seen corresponding path program 3 times [2022-11-25 23:22:08,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:22:08,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897933384] [2022-11-25 23:22:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:08,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:22:08,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:22:08,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431855157] [2022-11-25 23:22:08,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:22:08,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:08,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:22:08,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:22:08,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:22:21,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:22:21,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:22:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:22:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-25 23:22:21,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:22:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-25 23:22:21,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:22:21,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897933384] [2022-11-25 23:22:21,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:22:21,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431855157] [2022-11-25 23:22:21,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431855157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:22:21,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [245589408] [2022-11-25 23:22:21,389 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:22:21,389 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:22:21,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:22:21,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:22:21,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:22:21,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:21,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:21,515 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-25 23:22:21,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-25 23:22:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:21,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:21,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:21,669 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:22:21,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:22:21,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:21,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:21,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-25 23:22:22,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:22,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,111 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:22:22,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:22:22,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,268 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:22,269 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:22,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,323 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:22,323 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:22,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,553 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:22,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:22,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,667 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:22,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:22,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,786 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:22,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:22,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:22,894 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:22,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:23,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:23,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:23,090 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:23,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:23,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:23,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:23,199 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:23,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:23,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:22:24,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1151#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 23:22:24,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:22:24,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:22:24,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-25 23:22:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30230927] [2022-11-25 23:22:24,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:22:24,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:22:24,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:22:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:22:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:22:24,191 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:24,483 INFO L93 Difference]: Finished difference Result 158 states and 212 transitions. [2022-11-25 23:22:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:22:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-25 23:22:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:24,489 INFO L225 Difference]: With dead ends: 158 [2022-11-25 23:22:24,489 INFO L226 Difference]: Without dead ends: 116 [2022-11-25 23:22:24,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:22:24,492 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 166 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:24,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 33 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:22:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-25 23:22:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2022-11-25 23:22:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1875) internal successors, (114), 96 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-11-25 23:22:24,547 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 37 [2022-11-25 23:22:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:24,547 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-11-25 23:22:24,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-11-25 23:22:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-25 23:22:24,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:24,549 INFO L195 NwaCegarLoop]: trace histogram [40, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:24,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:24,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:22:24,750 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:22:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:24,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2081508276, now seen corresponding path program 4 times [2022-11-25 23:22:24,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:22:24,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383594076] [2022-11-25 23:22:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:22:24,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:22:24,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822700257] [2022-11-25 23:22:24,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:22:24,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:24,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:22:24,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:22:24,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:22:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:25,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:22:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-25 23:22:25,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:22:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-25 23:22:25,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:22:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383594076] [2022-11-25 23:22:25,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:22:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822700257] [2022-11-25 23:22:25,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822700257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:22:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551862298] [2022-11-25 23:22:25,484 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:22:25,484 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:22:25,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:22:25,485 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:22:25,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:22:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:25,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:25,600 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-25 23:22:25,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-25 23:22:25,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:25,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:25,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:25,740 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:22:25,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:22:25,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:25,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:25,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-25 23:22:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:26,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:26,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,122 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:22:26,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:22:26,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,257 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:26,257 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:26,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,319 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:26,320 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:26,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,525 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-25 23:22:26,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-25 23:22:26,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,624 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:26,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:26,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,759 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-25 23:22:26,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-25 23:22:26,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,858 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:26,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:26,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:26,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:27,027 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-25 23:22:27,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-25 23:22:27,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:27,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:27,133 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:27,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:27,152 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:22:28,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2049#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 23:22:28,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:22:28,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:22:28,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-25 23:22:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531363282] [2022-11-25 23:22:28,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:22:28,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 23:22:28,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:22:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 23:22:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:22:28,119 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:28,746 INFO L93 Difference]: Finished difference Result 320 states and 416 transitions. [2022-11-25 23:22:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 23:22:28,747 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-25 23:22:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:28,748 INFO L225 Difference]: With dead ends: 320 [2022-11-25 23:22:28,749 INFO L226 Difference]: Without dead ends: 236 [2022-11-25 23:22:28,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=723, Invalid=1083, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 23:22:28,750 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 338 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:28,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 69 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:22:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-25 23:22:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 193. [2022-11-25 23:22:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.15625) internal successors, (222), 192 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 222 transitions. [2022-11-25 23:22:28,809 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 222 transitions. Word has length 67 [2022-11-25 23:22:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:28,809 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 222 transitions. [2022-11-25 23:22:28,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 222 transitions. [2022-11-25 23:22:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-25 23:22:28,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:28,811 INFO L195 NwaCegarLoop]: trace histogram [88, 22, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:28,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:29,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:29,018 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:22:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash 502361932, now seen corresponding path program 5 times [2022-11-25 23:22:29,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:22:29,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980684393] [2022-11-25 23:22:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:22:29,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:22:29,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278475074] [2022-11-25 23:22:29,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:22:29,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:22:29,103 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:22:29,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:22:29,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:22:29,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:22:29,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:22:29,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4450 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4449 trivial. 0 not checked. [2022-11-25 23:22:29,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:22:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4450 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4449 trivial. 0 not checked. [2022-11-25 23:22:29,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:22:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980684393] [2022-11-25 23:22:29,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:22:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278475074] [2022-11-25 23:22:29,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278475074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:22:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1418170849] [2022-11-25 23:22:29,828 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:22:29,828 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:22:29,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:22:29,829 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:22:29,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:22:29,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:29,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:29,938 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-25 23:22:29,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-25 23:22:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:29,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:29,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:30,087 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:22:30,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:22:30,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:30,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:30,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-25 23:22:30,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:30,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:30,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:30,487 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:22:30,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:22:30,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:30,618 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:30,619 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:30,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:30,664 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:22:30,664 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:22:30,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:30,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:30,873 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:30,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:30,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:30,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:30,958 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:30,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:31,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:31,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:31,071 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-25 23:22:31,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-25 23:22:31,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:31,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:31,174 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:31,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:31,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:31,328 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:31,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:31,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:31,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:31,437 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:22:31,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-25 23:22:31,457 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:22:32,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3763#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 23:22:32,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:22:32,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:22:32,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-25 23:22:32,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069088536] [2022-11-25 23:22:32,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:22:32,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:22:32,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:22:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:22:32,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:22:32,335 INFO L87 Difference]: Start difference. First operand 193 states and 222 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:32,565 INFO L93 Difference]: Finished difference Result 546 states and 669 transitions. [2022-11-25 23:22:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:22:32,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-25 23:22:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:32,568 INFO L225 Difference]: With dead ends: 546 [2022-11-25 23:22:32,568 INFO L226 Difference]: Without dead ends: 476 [2022-11-25 23:22:32,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 364 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:22:32,570 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 92 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:32,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 16 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:22:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-25 23:22:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 265. [2022-11-25 23:22:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2022-11-25 23:22:32,642 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 127 [2022-11-25 23:22:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:32,642 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2022-11-25 23:22:32,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:22:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2022-11-25 23:22:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-25 23:22:32,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:32,646 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:32,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:32,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:32,848 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:22:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash 109665440, now seen corresponding path program 6 times [2022-11-25 23:22:32,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:22:32,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292392537] [2022-11-25 23:22:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:22:32,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:22:32,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779371971] [2022-11-25 23:22:32,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:22:32,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:22:32,958 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:22:32,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d18024-9cdd-4416-9b76-9fdf407a4efe/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process