./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/indp4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh --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 5dacb0c2523573165d60080200ebb5b22db90f6a3f4c08906b6192cd2123eb78 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:53:35,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:53:35,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:53:35,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:53:35,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:53:35,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:53:35,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:53:35,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:53:35,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:53:35,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:53:35,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:53:35,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:53:35,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:53:35,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:53:35,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:53:35,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:53:35,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:53:35,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:53:35,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:53:35,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:53:35,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:53:35,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:53:35,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:53:35,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:53:35,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:53:35,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:53:35,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:53:35,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:53:35,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:53:35,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:53:35,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:53:35,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:53:35,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:53:35,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:53:35,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:53:35,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:53:35,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:53:35,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:53:35,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:53:35,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:53:35,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:53:35,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:53:35,541 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:53:35,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:53:35,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:53:35,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:53:35,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:53:35,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:53:35,543 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:53:35,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:53:35,544 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:53:35,544 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:53:35,544 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:53:35,544 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:53:35,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:53:35,544 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:53:35,545 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:53:35,545 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:53:35,545 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:53:35,545 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:53:35,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:53:35,546 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:53:35,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:53:35,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:53:35,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:53:35,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:53:35,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:53:35,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:53:35,548 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:53:35,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:53:35,548 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:53:35,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:53:35,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:53:35,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:53:35,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:53:35,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:53:35,549 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:53:35,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:53:35,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:53:35,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:53:35,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:53:35,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:53:35,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:53:35,550 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_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dacb0c2523573165d60080200ebb5b22db90f6a3f4c08906b6192cd2123eb78 [2022-12-14 12:53:35,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:53:35,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:53:35,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:53:35,748 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:53:35,748 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:53:35,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/indp4.c [2022-12-14 12:53:38,257 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:53:38,429 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:53:38,429 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/sv-benchmarks/c/array-fpi/indp4.c [2022-12-14 12:53:38,434 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/data/c5aa2dbbb/4418a7f17a0a425298e5de97af1e375f/FLAG1deda981d [2022-12-14 12:53:38,833 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/data/c5aa2dbbb/4418a7f17a0a425298e5de97af1e375f [2022-12-14 12:53:38,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:53:38,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:53:38,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:53:38,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:53:38,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:53:38,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:38,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663c2289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38, skipping insertion in model container [2022-12-14 12:53:38,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:38,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:53:38,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:53:38,956 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_c027724e-a03d-43d0-8cc6-b260cf3b139d/sv-benchmarks/c/array-fpi/indp4.c[588,601] [2022-12-14 12:53:38,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:53:38,975 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:53:38,983 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_c027724e-a03d-43d0-8cc6-b260cf3b139d/sv-benchmarks/c/array-fpi/indp4.c[588,601] [2022-12-14 12:53:38,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:53:38,997 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:53:38,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38 WrapperNode [2022-12-14 12:53:38,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:53:38,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:53:38,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:53:38,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:53:39,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,021 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2022-12-14 12:53:39,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:53:39,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:53:39,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:53:39,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:53:39,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,037 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:53:39,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:53:39,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:53:39,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:53:39,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (1/1) ... [2022-12-14 12:53:39,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:53:39,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:39,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:53:39,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:53:39,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:53:39,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:53:39,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:53:39,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:53:39,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:53:39,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:53:39,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:53:39,142 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:53:39,144 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:53:39,255 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:53:39,286 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:53:39,286 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 12:53:39,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:53:39 BoogieIcfgContainer [2022-12-14 12:53:39,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:53:39,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:53:39,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:53:39,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:53:39,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:53:38" (1/3) ... [2022-12-14 12:53:39,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fda0415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:53:39, skipping insertion in model container [2022-12-14 12:53:39,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:53:38" (2/3) ... [2022-12-14 12:53:39,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fda0415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:53:39, skipping insertion in model container [2022-12-14 12:53:39,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:53:39" (3/3) ... [2022-12-14 12:53:39,294 INFO L112 eAbstractionObserver]: Analyzing ICFG indp4.c [2022-12-14 12:53:39,309 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:53:39,309 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:53:39,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:53:39,350 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;@255d11e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:53:39,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:53:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) 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) [2022-12-14 12:53:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:53:39,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:39,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:53:39,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1718194540, now seen corresponding path program 1 times [2022-12-14 12:53:39,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:53:39,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399224388] [2022-12-14 12:53:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:39,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:53:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:39,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:53:39,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399224388] [2022-12-14 12:53:39,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 12:53:39,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638837901] [2022-12-14 12:53:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:39,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:39,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:39,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:53:39,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:53:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:53:39,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:53:39,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:53:39,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638837901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:53:39,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:53:39,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:53:39,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230394051] [2022-12-14 12:53:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:53:39,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:53:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:53:39,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:53:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:53:39,617 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-12-14 12:53:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:39,666 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-12-14 12:53:39,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:53:39,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 12:53:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:39,675 INFO L225 Difference]: With dead ends: 22 [2022-12-14 12:53:39,675 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 12:53:39,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:53:39,684 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:39,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:53:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 12:53:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 12:53:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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) [2022-12-14 12:53:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-12-14 12:53:39,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2022-12-14 12:53:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:39,707 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-12-14 12:53:39,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-12-14 12:53:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-12-14 12:53:39,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:53:39,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:39,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:53:39,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:53:39,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:39,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash 473790610, now seen corresponding path program 1 times [2022-12-14 12:53:39,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:53:39,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931136237] [2022-12-14 12:53:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:39,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:53:39,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:53:39,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611757370] [2022-12-14 12:53:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:39,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:39,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:39,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:53:39,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:53:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:53:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:53:40,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:53:40,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:53:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931136237] [2022-12-14 12:53:40,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:53:40,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611757370] [2022-12-14 12:53:40,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611757370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:53:40,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:53:40,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:53:40,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679542543] [2022-12-14 12:53:40,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:53:40,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:53:40,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:53:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:53:40,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:53:40,129 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-12-14 12:53:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:40,164 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-12-14 12:53:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:53:40,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2022-12-14 12:53:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:40,165 INFO L225 Difference]: With dead ends: 24 [2022-12-14 12:53:40,166 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 12:53:40,166 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 [2022-12-14 12:53:40,167 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:40,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:53:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 12:53:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-12-14 12:53:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-12-14 12:53:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-12-14 12:53:40,173 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-12-14 12:53:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:40,173 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-12-14 12:53:40,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-12-14 12:53:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-12-14 12:53:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:53:40,174 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:40,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:53:40,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:53:40,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:40,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:40,378 INFO L85 PathProgramCache]: Analyzing trace with hash -905852742, now seen corresponding path program 1 times [2022-12-14 12:53:40,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:53:40,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658897902] [2022-12-14 12:53:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:53:40,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:53:40,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554073125] [2022-12-14 12:53:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:40,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:40,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:40,437 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:53:40,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:53:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 12:53:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:40,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:53:40,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-14 12:53:40,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-14 12:53:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:53:40,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:53:40,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-12-14 12:53:40,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:53:40,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 102 [2022-12-14 12:53:40,977 INFO L321 Elim1Store]: treesize reduction 23, result has 39.5 percent of original size [2022-12-14 12:53:40,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 85 treesize of output 49 [2022-12-14 12:53:41,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:53:41,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-12-14 12:53:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:53:41,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:53:41,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658897902] [2022-12-14 12:53:41,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:53:41,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554073125] [2022-12-14 12:53:41,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554073125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:53:41,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157229927] [2022-12-14 12:53:41,029 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:53:41,030 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:53:41,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:53:41,036 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:53:41,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:53:41,111 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:53:41,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:53:41,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:53:41,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 12:53:41,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:41,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:41,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:41,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:41,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:53:41,310 INFO L321 Elim1Store]: treesize reduction 195, result has 19.4 percent of original size [2022-12-14 12:53:41,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 393 treesize of output 407 [2022-12-14 12:53:41,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 12:53:41,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:53:41,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:53:41,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:53:41,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:53:41,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:53:41,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:53:41,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:53:41,822 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:53:41,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:53:41,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:53:41,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-12-14 12:53:41,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094372250] [2022-12-14 12:53:41,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:53:41,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:53:41,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:53:41,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:53:41,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:53:41,825 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-12-14 12:53:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:42,018 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-12-14 12:53:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:53:42,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 11 [2022-12-14 12:53:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:42,019 INFO L225 Difference]: With dead ends: 41 [2022-12-14 12:53:42,019 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 12:53:42,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:53:42,020 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:42,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:53:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 12:53:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2022-12-14 12:53:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 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) [2022-12-14 12:53:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2022-12-14 12:53:42,025 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 11 [2022-12-14 12:53:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:42,025 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2022-12-14 12:53:42,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-12-14 12:53:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2022-12-14 12:53:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:53:42,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:42,026 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:53:42,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:53:42,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:42,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1778275334, now seen corresponding path program 2 times [2022-12-14 12:53:42,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:53:42,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703272987] [2022-12-14 12:53:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:42,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:53:42,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:53:42,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55517495] [2022-12-14 12:53:42,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:53:42,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:42,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:42,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:53:42,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:53:42,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:53:42,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:53:42,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 12:53:42,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:42,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 59 [2022-12-14 12:53:42,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 101 [2022-12-14 12:53:42,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 10 [2022-12-14 12:53:44,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 214 [2022-12-14 12:53:44,816 INFO L321 Elim1Store]: treesize reduction 140, result has 0.7 percent of original size [2022-12-14 12:53:44,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 213 treesize of output 276 [2022-12-14 12:53:44,968 INFO L321 Elim1Store]: treesize reduction 73, result has 15.1 percent of original size [2022-12-14 12:53:44,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 269 treesize of output 200 [2022-12-14 12:53:51,240 INFO L321 Elim1Store]: treesize reduction 53, result has 5.4 percent of original size [2022-12-14 12:53:51,240 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 2 case distinctions, treesize of input 49 treesize of output 34 [2022-12-14 12:53:52,723 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-14 12:53:52,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 43 [2022-12-14 12:53:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:53:52,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:53:53,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-12-14 12:53:53,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:53:53,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 102 [2022-12-14 12:53:53,247 INFO L321 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2022-12-14 12:53:53,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 84 treesize of output 61 [2022-12-14 12:53:53,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:53:53,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-12-14 12:53:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:53:53,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:53:53,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703272987] [2022-12-14 12:53:53,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:53:53,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55517495] [2022-12-14 12:53:53,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55517495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:53:53,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135293816] [2022-12-14 12:53:53,460 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:53:53,460 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:53:53,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:53:53,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:53:53,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:53:53,509 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 12:53:53,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 12:53:53,553 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:53:53,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:53:53,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 133 [2022-12-14 12:53:53,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:53:53,726 INFO L321 Elim1Store]: treesize reduction 214, result has 6.6 percent of original size [2022-12-14 12:53:53,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 43 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 12 case distinctions, treesize of input 424 treesize of output 413 [2022-12-14 12:53:53,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 12:53:53,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:53:53,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:53:53,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:53:53,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:53:53,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:53:53,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:53:53,911 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:53:54,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '442#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:53:54,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:53:54,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:53:54,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-12-14 12:53:54,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369232409] [2022-12-14 12:53:54,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:53:54,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 12:53:54,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:53:54,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 12:53:54,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=341, Unknown=3, NotChecked=0, Total=420 [2022-12-14 12:53:54,251 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2022-12-14 12:53:56,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:53:58,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:54:04,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:54:11,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:54:13,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:54:20,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:54:27,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:54:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:27,796 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2022-12-14 12:54:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 12:54:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 12:54:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:27,798 INFO L225 Difference]: With dead ends: 58 [2022-12-14 12:54:27,798 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 12:54:27,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=282, Invalid=975, Unknown=3, NotChecked=0, Total=1260 [2022-12-14 12:54:27,799 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 78 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 31 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:27,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 43 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 135 Invalid, 6 Unknown, 0 Unchecked, 17.6s Time] [2022-12-14 12:54:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 12:54:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 26. [2022-12-14 12:54:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 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) [2022-12-14 12:54:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2022-12-14 12:54:27,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 13 [2022-12-14 12:54:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:27,814 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2022-12-14 12:54:27,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2022-12-14 12:54:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2022-12-14 12:54:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:54:27,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:27,814 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:27,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:54:28,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:28,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1202207386, now seen corresponding path program 3 times [2022-12-14 12:54:28,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:28,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991279784] [2022-12-14 12:54:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:28,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:28,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:54:28,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553271043] [2022-12-14 12:54:28,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:54:28,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:28,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:28,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:28,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:54:28,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:54:28,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:54:28,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:54:28,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:54:28,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:54:28,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991279784] [2022-12-14 12:54:28,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:54:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553271043] [2022-12-14 12:54:28,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553271043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:54:28,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330608719] [2022-12-14 12:54:28,128 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:54:28,128 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:54:28,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:54:28,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:54:28,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:54:28,197 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 12:54:28,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 12:54:28,244 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:54:28,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:54:28,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 12:54:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:28,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:28,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:28,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:54:28,441 INFO L321 Elim1Store]: treesize reduction 195, result has 19.4 percent of original size [2022-12-14 12:54:28,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 393 treesize of output 407 [2022-12-14 12:54:28,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 12:54:28,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:28,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:28,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:28,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:28,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:28,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:28,680 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:54:28,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '696#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:54:28,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:54:28,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:54:28,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 12:54:28,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583408550] [2022-12-14 12:54:28,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:54:28,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:54:28,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:54:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:54:28,916 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2022-12-14 12:54:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:29,029 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2022-12-14 12:54:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:54:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 [2022-12-14 12:54:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:29,030 INFO L225 Difference]: With dead ends: 64 [2022-12-14 12:54:29,030 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 12:54:29,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:54:29,031 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:29,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 12:54:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2022-12-14 12:54:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2022-12-14 12:54:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-12-14 12:54:29,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 13 [2022-12-14 12:54:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:29,043 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-12-14 12:54:29,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2022-12-14 12:54:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-12-14 12:54:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 12:54:29,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:29,044 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:29,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 12:54:29,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:29,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1219271628, now seen corresponding path program 4 times [2022-12-14 12:54:29,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:29,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965525847] [2022-12-14 12:54:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:29,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:29,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:54:29,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880290887] [2022-12-14 12:54:29,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:54:29,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:29,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:29,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:29,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:54:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:29,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:54:29,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:54:29,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:54:29,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:29,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965525847] [2022-12-14 12:54:29,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:54:29,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880290887] [2022-12-14 12:54:29,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880290887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:54:29,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826797319] [2022-12-14 12:54:29,400 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:54:29,400 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:54:29,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:54:29,401 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:54:29,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:54:29,449 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:54:29,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:54:29,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:54:29,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 12:54:29,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:29,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:29,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:29,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:29,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:29,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:29,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:54:29,642 INFO L321 Elim1Store]: treesize reduction 195, result has 19.4 percent of original size [2022-12-14 12:54:29,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 393 treesize of output 407 [2022-12-14 12:54:29,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 12:54:29,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:54:29,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:29,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:29,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:29,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:29,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:29,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:54:30,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '949#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:54:30,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:54:30,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:54:30,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-12-14 12:54:30,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608715064] [2022-12-14 12:54:30,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:54:30,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:54:30,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:54:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:54:30,089 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) 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) [2022-12-14 12:54:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:30,238 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-12-14 12:54:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:54:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) 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) Word has length 14 [2022-12-14 12:54:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:30,239 INFO L225 Difference]: With dead ends: 71 [2022-12-14 12:54:30,239 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 12:54:30,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:54:30,240 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:30,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 33 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 12:54:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2022-12-14 12:54:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 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) [2022-12-14 12:54:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-12-14 12:54:30,258 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 14 [2022-12-14 12:54:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:30,258 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-12-14 12:54:30,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) 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) [2022-12-14 12:54:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-12-14 12:54:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:54:30,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:30,259 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:30,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:54:30,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:30,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1279287954, now seen corresponding path program 5 times [2022-12-14 12:54:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:30,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577813956] [2022-12-14 12:54:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:30,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:30,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:54:30,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78289329] [2022-12-14 12:54:30,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:54:30,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:30,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:30,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:30,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:54:30,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:54:30,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:54:30,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:54:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:54:30,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:54:30,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:30,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577813956] [2022-12-14 12:54:30,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:54:30,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78289329] [2022-12-14 12:54:30,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78289329] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:54:30,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808709026] [2022-12-14 12:54:30,687 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:54:30,687 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:54:30,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:54:30,687 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:54:30,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:54:30,734 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:54:30,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:54:30,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:54:30,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 12:54:30,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:30,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:30,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:30,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:54:30,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:54:30,895 INFO L321 Elim1Store]: treesize reduction 195, result has 19.4 percent of original size [2022-12-14 12:54:30,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 393 treesize of output 407 [2022-12-14 12:54:30,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 12:54:30,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:54:31,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:31,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:31,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:31,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:31,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:54:31,068 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:54:31,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1225#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:54:31,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:54:31,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:54:31,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 12:54:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887277122] [2022-12-14 12:54:31,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:54:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:54:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:54:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:54:31,249 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2022-12-14 12:54:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:31,388 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-12-14 12:54:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:54:31,389 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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 15 [2022-12-14 12:54:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:31,389 INFO L225 Difference]: With dead ends: 57 [2022-12-14 12:54:31,389 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 12:54:31,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:54:31,390 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:31,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 40 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 12:54:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2022-12-14 12:54:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:54:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-12-14 12:54:31,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2022-12-14 12:54:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:31,400 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-12-14 12:54:31,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2022-12-14 12:54:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-12-14 12:54:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:54:31,400 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:31,400 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:31,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:54:31,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:31,602 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash 472268986, now seen corresponding path program 6 times [2022-12-14 12:54:31,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:31,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027689572] [2022-12-14 12:54:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:31,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:31,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:54:31,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380895849] [2022-12-14 12:54:31,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:54:31,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:31,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:31,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:31,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:54:31,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:54:31,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:54:31,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 12:54:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:31,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2022-12-14 12:54:31,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-12-14 12:54:31,803 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:54:31,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 12:54:31,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 12:54:31,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-14 12:54:31,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:54:31,854 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 1 case distinctions, treesize of input 32 treesize of output 25 [2022-12-14 12:54:31,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:54:31,861 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 1 case distinctions, treesize of input 32 treesize of output 25 [2022-12-14 12:54:31,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-14 12:54:31,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:54:31,879 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 1 case distinctions, treesize of input 32 treesize of output 25 [2022-12-14 12:54:31,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:54:31,885 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 1 case distinctions, treesize of input 32 treesize of output 25 [2022-12-14 12:54:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:54:31,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:33,976 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (* .cse5 8)) (.cse0 (<= .cse5 2147483647))) (and (or (not .cse0) (forall ((v_ArrVal_205 Int)) (let ((.cse2 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (select (store .cse1 .cse2 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< (select .cse1 .cse2) (+ v_ArrVal_205 |c_ULTIMATE.start_main_~i~0#1|)))))) (or (forall ((v_ArrVal_205 Int)) (let ((.cse4 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (or (< (select .cse1 .cse4) (+ v_ArrVal_205 |c_ULTIMATE.start_main_~i~0#1|)) (= (select (store .cse1 .cse4 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) .cse0)))) is different from false [2022-12-14 12:54:36,147 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse17 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) (let ((.cse7 (<= .cse17 2147483647)) (.cse16 (* .cse17 8)) (.cse15 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse0 (<= .cse15 2147483647)) (.cse9 (+ .cse16 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse3 (+ .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (not .cse7)) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse10 (* .cse15 8))) (and (or .cse0 (let ((.cse6 (+ .cse10 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (let ((.cse4 (select .cse5 .cse6))) (and (or .cse1 (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse2 (store .cse5 .cse6 v_ArrVal_203))) (or (= (select (store .cse2 .cse3 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< .cse4 (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1|)) (< (select .cse2 .cse3) (+ v_ArrVal_205 |c_ULTIMATE.start_main_~i~0#1| 1)))))) (or .cse7 (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse8 (store .cse5 .cse6 v_ArrVal_203))) (or (< (select .cse8 .cse9) (+ v_ArrVal_205 |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store .cse8 .cse9 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< .cse4 (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1|)))))))))) (or (not .cse0) (let ((.cse13 (+ .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse11 (select .cse5 .cse13))) (and (or (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse12 (store .cse5 .cse13 v_ArrVal_203))) (or (< .cse11 (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1|)) (= (select (store .cse12 .cse9 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< (select .cse12 .cse9) (+ v_ArrVal_205 |c_ULTIMATE.start_main_~i~0#1| 1))))) .cse7) (or (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse14 (store .cse5 .cse13 v_ArrVal_203))) (or (< .cse11 (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1|)) (= (select (store .cse14 .cse3 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< (select .cse14 .cse3) (+ v_ArrVal_205 |c_ULTIMATE.start_main_~i~0#1| 1))))) .cse1))))))))) is different from false [2022-12-14 12:54:38,486 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse28 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse27 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) (let ((.cse0 (<= .cse27 2147483647)) (.cse6 (<= .cse28 2147483647)) (.cse26 (* 8 .cse28)) (.cse25 (* .cse27 8)) (.cse24 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse17 (<= .cse24 2147483647)) (.cse5 (+ .cse25 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse3 (+ .cse26 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse7 (not .cse6)) (.cse9 (+ .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse11 (+ .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse10 (not .cse0)) (.cse15 (* (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (.cse13 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse16 (* .cse24 8))) (and (or (let ((.cse4 (let ((.cse14 (+ .cse16 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse13 .cse14 (+ .cse15 (select .cse13 .cse14)))))) (and (or .cse0 (let ((.cse1 (select .cse4 .cse5))) (and (or (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse2 (store .cse4 .cse5 v_ArrVal_203))) (or (< .cse1 (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1| 1)) (= 1 (select (store .cse2 .cse3 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|)) (< (select .cse2 .cse3) (+ v_ArrVal_205 2 |c_ULTIMATE.start_main_~i~0#1|))))) .cse6) (or .cse7 (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse8 (store .cse4 .cse5 v_ArrVal_203))) (or (< (select .cse8 .cse9) (+ v_ArrVal_205 2 |c_ULTIMATE.start_main_~i~0#1|)) (< .cse1 (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store .cse8 .cse9 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))))))) (or .cse10 (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse12 (store .cse4 .cse11 v_ArrVal_203))) (or (< (select .cse4 .cse11) (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1| 1)) (< (select .cse12 .cse9) (+ v_ArrVal_205 2 |c_ULTIMATE.start_main_~i~0#1|)) (= (select (store .cse12 .cse9 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))))))) .cse17) (or (not .cse17) (let ((.cse19 (let ((.cse23 (+ .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse13 .cse23 (+ .cse15 (select .cse13 .cse23)))))) (and (or .cse0 (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse18 (store .cse19 .cse5 v_ArrVal_203))) (or (< (select .cse18 .cse3) (+ v_ArrVal_205 2 |c_ULTIMATE.start_main_~i~0#1|)) (= (select (store .cse18 .cse3 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< (select .cse19 .cse5) (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1| 1)))))) (or (let ((.cse20 (select .cse19 .cse11))) (and (or (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse21 (store .cse19 .cse11 v_ArrVal_203))) (or (< .cse20 (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store .cse21 .cse3 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< (select .cse21 .cse3) (+ v_ArrVal_205 2 |c_ULTIMATE.start_main_~i~0#1|))))) .cse6) (or .cse7 (forall ((v_ArrVal_203 Int) (v_ArrVal_205 Int)) (let ((.cse22 (store .cse19 .cse11 v_ArrVal_203))) (or (< .cse20 (+ v_ArrVal_203 |c_ULTIMATE.start_main_~i~0#1| 1)) (< (select .cse22 .cse9) (+ v_ArrVal_205 2 |c_ULTIMATE.start_main_~i~0#1|)) (= (select (store .cse22 .cse9 v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))))))) .cse10)))))))) is different from false [2022-12-14 12:55:02,623 WARN L233 SmtUtils]: Spent 10.76s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:55:04,768 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse17 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) (let ((.cse6 (<= .cse17 2147483647)) (.cse16 (* .cse17 8)) (.cse15 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse10 (<= .cse15 2147483647)) (.cse2 (+ .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (not .cse6)) (.cse8 (+ .cse16 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse9 (* .cse15 8))) (and (or (let ((.cse5 (+ .cse9 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (let ((.cse3 (select .cse4 .cse5))) (and (or .cse0 (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse1 (store .cse4 .cse5 v_ArrVal_197))) (or (= (select (store .cse1 .cse2 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< (select .cse1 .cse2) (+ v_ArrVal_200 |c_ULTIMATE.start_main_~i~0#1| 1)) (< .cse3 (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1|)))))) (or .cse6 (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse7 (store .cse4 .cse5 v_ArrVal_197))) (or (< (select .cse7 .cse8) (+ v_ArrVal_200 |c_ULTIMATE.start_main_~i~0#1| 1)) (< .cse3 (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1|)) (= (select (store .cse7 .cse8 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))))))) .cse10) (or (not .cse10) (let ((.cse13 (+ .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse11 (select .cse4 .cse13))) (and (or (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse12 (store .cse4 .cse13 v_ArrVal_197))) (or (< .cse11 (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1|)) (< (select .cse12 .cse2) (+ v_ArrVal_200 |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store .cse12 .cse2 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) .cse0) (or .cse6 (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse14 (store .cse4 .cse13 v_ArrVal_197))) (or (< (select .cse14 .cse8) (+ v_ArrVal_200 |c_ULTIMATE.start_main_~i~0#1| 1)) (< .cse11 (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1|)) (= (select (store .cse14 .cse8 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))))))))))))) is different from false [2022-12-14 12:55:07,079 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse27 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse28 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse24 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse9 (<= .cse28 2147483647)) (.cse26 (* 8 .cse28)) (.cse25 (* .cse27 8)) (.cse11 (<= .cse27 2147483647))) (let ((.cse10 (not .cse11)) (.cse6 (+ .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (+ .cse26 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse1 (not .cse9)) (.cse3 (+ .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse13 (+ .cse25 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse16 (* (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (.cse14 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse17 (* .cse24 8)) (.cse0 (<= .cse24 2147483647))) (and (or (not .cse0) (let ((.cse5 (let ((.cse15 (+ .cse17 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse14 .cse15 (+ .cse16 (select .cse14 .cse15)))))) (and (or (let ((.cse4 (select .cse5 .cse6))) (and (or .cse1 (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse2 (store .cse5 .cse6 v_ArrVal_197))) (or (= (select (store .cse2 .cse3 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< (select .cse2 .cse3) (+ v_ArrVal_200 2 |c_ULTIMATE.start_main_~i~0#1|)) (< .cse4 (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1| 1)))))) (or (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse7 (store .cse5 .cse6 v_ArrVal_197))) (or (< (select .cse7 .cse8) (+ v_ArrVal_200 2 |c_ULTIMATE.start_main_~i~0#1|)) (< .cse4 (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store .cse7 .cse8 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) .cse9))) .cse10) (or .cse11 (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse12 (store .cse5 .cse13 v_ArrVal_197))) (or (< (select .cse12 .cse8) (+ v_ArrVal_200 2 |c_ULTIMATE.start_main_~i~0#1|)) (< (select .cse5 .cse13) (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store .cse12 .cse8 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))))))) (or (let ((.cse18 (let ((.cse23 (+ .cse17 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse14 .cse23 (+ .cse16 (select .cse14 .cse23)))))) (and (or .cse10 (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse19 (store .cse18 .cse6 v_ArrVal_197))) (or (< (select .cse18 .cse6) (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1| 1)) (< (select .cse19 .cse3) (+ v_ArrVal_200 2 |c_ULTIMATE.start_main_~i~0#1|)) (= (select (store .cse19 .cse3 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))))) (or .cse11 (let ((.cse21 (select .cse18 .cse13))) (and (or (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse20 (store .cse18 .cse13 v_ArrVal_197))) (or (= (select (store .cse20 .cse8 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< .cse21 (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1| 1)) (< (select .cse20 .cse8) (+ v_ArrVal_200 2 |c_ULTIMATE.start_main_~i~0#1|))))) .cse9) (or .cse1 (forall ((v_ArrVal_200 Int) (v_ArrVal_197 Int)) (let ((.cse22 (store .cse18 .cse13 v_ArrVal_197))) (or (= (select (store .cse22 .cse3 v_ArrVal_200) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (< .cse21 (+ v_ArrVal_197 |c_ULTIMATE.start_main_~i~0#1| 1)) (< (select .cse22 .cse3) (+ v_ArrVal_200 2 |c_ULTIMATE.start_main_~i~0#1|))))))))))) .cse0))))) is different from false [2022-12-14 12:55:11,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-12-14 12:55:11,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:55:11,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 102 [2022-12-14 12:55:11,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:55:11,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 288 [2022-12-14 12:55:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2022-12-14 12:55:11,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:11,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027689572] [2022-12-14 12:55:11,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:55:11,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380895849] [2022-12-14 12:55:11,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380895849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:11,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360763639] [2022-12-14 12:55:11,519 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:55:11,519 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:55:11,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:55:11,520 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:55:11,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:55:11,578 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 12:55:11,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 12:55:11,627 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:55:11,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:55:11,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 12:55:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:11,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:55:11,792 INFO L321 Elim1Store]: treesize reduction 195, result has 19.4 percent of original size [2022-12-14 12:55:11,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 393 treesize of output 407 [2022-12-14 12:55:11,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 12:55:11,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:55:11,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:11,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:11,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:55:11,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:11,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:11,972 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:55:12,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1495#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:55:12,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:55:12,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:55:12,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 18 [2022-12-14 12:55:12,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83815116] [2022-12-14 12:55:12,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:55:12,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:55:12,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:12,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:55:12,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=246, Unknown=11, NotChecked=180, Total=506 [2022-12-14 12:55:12,222 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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) [2022-12-14 12:55:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:19,118 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-12-14 12:55:19,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 12:55:19,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 12:55:19,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:19,120 INFO L225 Difference]: With dead ends: 80 [2022-12-14 12:55:19,120 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 12:55:19,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=138, Invalid=518, Unknown=14, NotChecked=260, Total=930 [2022-12-14 12:55:19,120 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:19,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 63 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 190 Invalid, 0 Unknown, 196 Unchecked, 0.4s Time] [2022-12-14 12:55:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 12:55:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2022-12-14 12:55:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:55:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-12-14 12:55:19,136 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 17 [2022-12-14 12:55:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:19,136 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-12-14 12:55:19,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 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) [2022-12-14 12:55:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-12-14 12:55:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:55:19,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:19,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:19,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:55:19,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:19,338 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:19,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash -917036790, now seen corresponding path program 1 times [2022-12-14 12:55:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:19,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208359405] [2022-12-14 12:55:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:19,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:19,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:55:19,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145171301] [2022-12-14 12:55:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:19,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:19,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:19,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:55:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 12:55:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:19,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:55:19,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 113 [2022-12-14 12:55:19,517 INFO L321 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2022-12-14 12:55:19,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 112 treesize of output 172 [2022-12-14 12:55:19,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 12:55:19,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 113 [2022-12-14 12:55:19,606 INFO L321 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2022-12-14 12:55:19,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 112 treesize of output 172 [2022-12-14 12:55:19,639 INFO L321 Elim1Store]: treesize reduction 57, result has 13.6 percent of original size [2022-12-14 12:55:19,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 115 treesize of output 35 [2022-12-14 12:55:19,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 12:55:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:55:19,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:20,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-12-14 12:55:20,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:55:20,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 102 [2022-12-14 12:55:20,554 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 12:55:20,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 89 treesize of output 53 [2022-12-14 12:55:20,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:55:20,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 12:55:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:55:20,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208359405] [2022-12-14 12:55:20,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:55:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145171301] [2022-12-14 12:55:20,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145171301] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096338193] [2022-12-14 12:55:20,651 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:55:20,651 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:55:20,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:55:20,652 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:55:20,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:55:20,693 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:55:20,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:55:20,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:55:20,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 133 [2022-12-14 12:55:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:20,881 INFO L321 Elim1Store]: treesize reduction 214, result has 6.6 percent of original size [2022-12-14 12:55:20,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 43 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 12 case distinctions, treesize of input 424 treesize of output 413 [2022-12-14 12:55:20,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 12:55:20,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:55:20,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:20,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:20,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:55:20,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:21,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:21,061 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:55:21,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1850#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:55:21,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:55:21,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:55:21,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-12-14 12:55:21,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431611708] [2022-12-14 12:55:21,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:55:21,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 12:55:21,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:21,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 12:55:21,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-12-14 12:55:21,676 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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) [2022-12-14 12:55:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:23,255 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2022-12-14 12:55:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 12:55:23,255 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 12:55:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:23,256 INFO L225 Difference]: With dead ends: 90 [2022-12-14 12:55:23,256 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 12:55:23,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=284, Invalid=2166, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 12:55:23,257 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 60 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:23,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 85 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:55:23,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 12:55:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 49. [2022-12-14 12:55:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 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) [2022-12-14 12:55:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-12-14 12:55:23,281 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 17 [2022-12-14 12:55:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:23,281 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-12-14 12:55:23,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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) [2022-12-14 12:55:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-12-14 12:55:23,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 12:55:23,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:23,282 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:23,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:55:23,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 12:55:23,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:23,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:23,485 INFO L85 PathProgramCache]: Analyzing trace with hash -169674476, now seen corresponding path program 7 times [2022-12-14 12:55:23,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:23,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100956156] [2022-12-14 12:55:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:23,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:23,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:55:23,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937632706] [2022-12-14 12:55:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:55:23,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:23,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:23,524 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:23,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:55:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:23,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:55:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:55:23,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:55:23,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100956156] [2022-12-14 12:55:23,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:55:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937632706] [2022-12-14 12:55:23,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937632706] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907231945] [2022-12-14 12:55:23,691 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:55:23,692 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:55:23,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:55:23,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:55:23,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:55:23,735 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:55:23,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:55:23,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:55:23,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 12:55:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:23,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:23,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:23,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:55:23,900 INFO L321 Elim1Store]: treesize reduction 195, result has 19.4 percent of original size [2022-12-14 12:55:23,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 393 treesize of output 407 [2022-12-14 12:55:23,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 12:55:23,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:24,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:24,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:24,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:55:24,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:24,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:24,066 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:55:24,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2260#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:55:24,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:55:24,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:55:24,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-12-14 12:55:24,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668361163] [2022-12-14 12:55:24,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:55:24,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:55:24,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:55:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:55:24,297 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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) [2022-12-14 12:55:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:24,755 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2022-12-14 12:55:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:55:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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 20 [2022-12-14 12:55:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:24,755 INFO L225 Difference]: With dead ends: 141 [2022-12-14 12:55:24,755 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 12:55:24,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=376, Invalid=1346, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 12:55:24,756 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 121 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:24,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 184 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:55:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 12:55:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 59. [2022-12-14 12:55:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 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) [2022-12-14 12:55:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-12-14 12:55:24,772 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 20 [2022-12-14 12:55:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:24,773 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-12-14 12:55:24,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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) [2022-12-14 12:55:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-12-14 12:55:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 12:55:24,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:24,773 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:24,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 12:55:24,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:55:24,975 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1358999959, now seen corresponding path program 8 times [2022-12-14 12:55:24,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:24,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403109362] [2022-12-14 12:55:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:24,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:25,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:55:25,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274548022] [2022-12-14 12:55:25,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:55:25,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:25,012 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:25,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:55:25,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:55:25,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:55:25,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:55:25,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:55:25,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:55:25,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:25,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403109362] [2022-12-14 12:55:25,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:55:25,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274548022] [2022-12-14 12:55:25,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274548022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:25,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235134063] [2022-12-14 12:55:25,635 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:55:25,635 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:55:25,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:55:25,636 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:55:25,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:55:25,692 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 12:55:25,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 12:55:25,743 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:55:25,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 12:55:25,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 12:55:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:25,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:25,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:25,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:25,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:25,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:55:25,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:55:25,924 INFO L321 Elim1Store]: treesize reduction 195, result has 19.4 percent of original size [2022-12-14 12:55:25,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 393 treesize of output 407 [2022-12-14 12:55:26,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 12:55:26,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:26,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:26,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:26,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:55:26,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:26,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 12:55:26,105 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:55:26,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2764#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 12:55:26,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:55:26,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:55:26,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-12-14 12:55:26,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900321452] [2022-12-14 12:55:26,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:55:26,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 12:55:26,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 12:55:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2022-12-14 12:55:26,381 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 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) [2022-12-14 12:55:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:26,816 INFO L93 Difference]: Finished difference Result 174 states and 195 transitions. [2022-12-14 12:55:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:55:26,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 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 20 [2022-12-14 12:55:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:26,817 INFO L225 Difference]: With dead ends: 174 [2022-12-14 12:55:26,817 INFO L226 Difference]: Without dead ends: 137 [2022-12-14 12:55:26,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1352, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 12:55:26,819 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 254 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:26,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 69 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:55:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-14 12:55:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 79. [2022-12-14 12:55:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 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) [2022-12-14 12:55:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2022-12-14 12:55:26,844 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 20 [2022-12-14 12:55:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:26,845 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2022-12-14 12:55:26,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 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) [2022-12-14 12:55:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2022-12-14 12:55:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 12:55:26,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:26,845 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:26,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:55:27,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:27,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash -56966518, now seen corresponding path program 2 times [2022-12-14 12:55:27,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:27,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176716624] [2022-12-14 12:55:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:27,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:27,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:55:27,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005194868] [2022-12-14 12:55:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:55:27,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:27,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:27,082 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:27,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:55:27,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:55:27,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:55:27,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 12:55:27,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:27,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2022-12-14 12:55:27,428 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:27,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-12-14 12:55:27,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 12:55:27,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 12:55:27,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:55:27,497 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 1 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 12:55:27,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 113 [2022-12-14 12:55:27,538 INFO L321 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2022-12-14 12:55:27,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 112 treesize of output 172 [2022-12-14 12:55:27,555 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:55:27,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 12:55:27,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-12-14 12:55:27,619 INFO L321 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2022-12-14 12:55:27,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 97 [2022-12-14 12:55:27,661 INFO L321 Elim1Store]: treesize reduction 29, result has 37.0 percent of original size [2022-12-14 12:55:27,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 75 treesize of output 34 [2022-12-14 12:55:27,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 113 [2022-12-14 12:55:27,746 INFO L321 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2022-12-14 12:55:27,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 112 treesize of output 172 [2022-12-14 12:55:27,772 INFO L321 Elim1Store]: treesize reduction 57, result has 13.6 percent of original size [2022-12-14 12:55:27,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 47 [2022-12-14 12:55:27,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 12:55:27,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:55:27,821 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 1 case distinctions, treesize of input 34 treesize of output 27 [2022-12-14 12:55:27,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 60 [2022-12-14 12:55:27,859 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-12-14 12:55:27,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 113 [2022-12-14 12:55:27,898 INFO L321 Elim1Store]: treesize reduction 33, result has 36.5 percent of original size [2022-12-14 12:55:27,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 87 treesize of output 38 [2022-12-14 12:55:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:55:28,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:56:04,965 WARN L233 SmtUtils]: Spent 22.13s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:57:06,860 WARN L233 SmtUtils]: Spent 53.18s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:00:20,657 WARN L233 SmtUtils]: Spent 3.02m on a formula simplification. DAG size of input: 198 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:01:07,785 WARN L233 SmtUtils]: Spent 9.46s on a formula simplification. DAG size of input: 149 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:01:42,396 WARN L233 SmtUtils]: Spent 24.34s on a formula simplification. DAG size of input: 144 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:02:12,834 WARN L233 SmtUtils]: Spent 13.82s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:02:30,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-12-14 13:02:30,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:02:30,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 102 [2022-12-14 13:02:31,049 INFO L321 Elim1Store]: treesize reduction 24, result has 55.6 percent of original size [2022-12-14 13:02:31,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1251 treesize of output 1224 [2022-12-14 13:02:31,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:02:31,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 305 treesize of output 284 [2022-12-14 13:02:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:02:52,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176716624] [2022-12-14 13:02:52,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:02:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005194868] [2022-12-14 13:02:52,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005194868] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427612217] [2022-12-14 13:02:52,584 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:02:52,584 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:52,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:52,585 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:52,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:52,654 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 13:02:52,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 13:02:52,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 13:02:52,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 13:02:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:52,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:52,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:52,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:52,840 INFO L321 Elim1Store]: treesize reduction 195, result has 19.4 percent of original size [2022-12-14 13:02:52,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 35 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 393 treesize of output 407 [2022-12-14 13:02:52,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 13:02:52,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:02:52,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 13:02:52,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 13:02:52,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:02:53,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 13:02:53,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2022-12-14 13:02:53,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:54,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3382#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1)) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 13:02:54,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:54,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:02:54,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2022-12-14 13:02:54,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773578204] [2022-12-14 13:02:54,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:54,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 13:02:54,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 13:02:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1735, Unknown=54, NotChecked=0, Total=2070 [2022-12-14 13:02:54,603 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 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) [2022-12-14 13:03:07,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:03:09,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:05:55,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-12-14 13:05:55,771 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-12-14 13:05:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:05:55,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 448.4s TimeCoverageRelationStatistics Valid=348, Invalid=2148, Unknown=54, NotChecked=0, Total=2550 [2022-12-14 13:05:55,774 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:55,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-12-14 13:05:55,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:05:55,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:05:55,977 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 55 more [2022-12-14 13:05:55,985 INFO L158 Benchmark]: Toolchain (without parser) took 737148.49ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 111.3MB in the beginning and 88.3MB in the end (delta: 23.1MB). Peak memory consumption was 104.2MB. Max. memory is 16.1GB. [2022-12-14 13:05:55,986 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 146.8MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:05:55,986 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.00ms. Allocated memory is still 146.8MB. Free memory was 111.3MB in the beginning and 100.3MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 13:05:55,986 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.31ms. Allocated memory is still 146.8MB. Free memory was 100.3MB in the beginning and 98.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:05:55,986 INFO L158 Benchmark]: Boogie Preprocessor took 16.95ms. Allocated memory is still 146.8MB. Free memory was 98.9MB in the beginning and 97.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:05:55,986 INFO L158 Benchmark]: RCFGBuilder took 248.77ms. Allocated memory is still 146.8MB. Free memory was 97.3MB in the beginning and 83.2MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 13:05:55,986 INFO L158 Benchmark]: TraceAbstraction took 736694.17ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 82.1MB in the beginning and 88.3MB in the end (delta: -6.2MB). Peak memory consumption was 74.8MB. Max. memory is 16.1GB. [2022-12-14 13:05:55,987 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 146.8MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 161.00ms. Allocated memory is still 146.8MB. Free memory was 111.3MB in the beginning and 100.3MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.31ms. Allocated memory is still 146.8MB. Free memory was 100.3MB in the beginning and 98.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.95ms. Allocated memory is still 146.8MB. Free memory was 98.9MB in the beginning and 97.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 248.77ms. Allocated memory is still 146.8MB. Free memory was 97.3MB in the beginning and 83.2MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 736694.17ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 82.1MB in the beginning and 88.3MB in the end (delta: -6.2MB). Peak memory consumption was 74.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/indp4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh --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 5dacb0c2523573165d60080200ebb5b22db90f6a3f4c08906b6192cd2123eb78 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:05:57,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:05:57,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:05:57,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:05:57,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:05:57,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:05:57,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:05:57,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:05:57,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:05:57,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:05:57,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:05:57,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:05:57,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:05:57,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:05:57,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:05:57,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:05:57,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:05:57,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:05:57,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:05:57,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:05:57,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:05:57,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:05:57,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:05:57,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:05:57,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:05:57,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:05:57,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:05:57,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:05:57,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:05:57,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:05:57,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:05:57,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:05:57,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:05:57,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:05:57,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:05:57,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:05:57,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:05:57,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:05:57,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:05:57,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:05:57,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:05:57,411 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 13:05:57,432 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:05:57,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:05:57,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:05:57,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:05:57,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:05:57,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:05:57,434 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:05:57,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:05:57,434 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:05:57,434 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:05:57,435 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:05:57,435 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:05:57,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:05:57,436 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:05:57,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:05:57,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:05:57,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:05:57,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:05:57,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:05:57,437 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:05:57,437 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 13:05:57,437 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 13:05:57,437 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:05:57,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:05:57,437 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:05:57,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:05:57,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:05:57,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 13:05:57,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:05:57,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:05:57,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:05:57,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:05:57,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:05:57,439 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 13:05:57,439 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 13:05:57,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:05:57,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:05:57,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 13:05:57,440 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dacb0c2523573165d60080200ebb5b22db90f6a3f4c08906b6192cd2123eb78 [2022-12-14 13:05:57,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:05:57,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:05:57,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:05:57,674 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:05:57,674 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:05:57,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/indp4.c [2022-12-14 13:06:00,228 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:06:00,372 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:06:00,372 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/sv-benchmarks/c/array-fpi/indp4.c [2022-12-14 13:06:00,378 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/data/0780736ff/80ce0ca359e6497cba3701b64100ff6d/FLAG9761485a7 [2022-12-14 13:06:00,389 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/data/0780736ff/80ce0ca359e6497cba3701b64100ff6d [2022-12-14 13:06:00,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:06:00,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:06:00,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:06:00,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:06:00,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:06:00,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bf7405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00, skipping insertion in model container [2022-12-14 13:06:00,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:06:00,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:06:00,516 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_c027724e-a03d-43d0-8cc6-b260cf3b139d/sv-benchmarks/c/array-fpi/indp4.c[588,601] [2022-12-14 13:06:00,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:06:00,541 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:06:00,551 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_c027724e-a03d-43d0-8cc6-b260cf3b139d/sv-benchmarks/c/array-fpi/indp4.c[588,601] [2022-12-14 13:06:00,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:06:00,566 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:06:00,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00 WrapperNode [2022-12-14 13:06:00,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:06:00,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:06:00,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:06:00,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:06:00,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,592 INFO L138 Inliner]: procedures = 18, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2022-12-14 13:06:00,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:06:00,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:06:00,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:06:00,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:06:00,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,610 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:06:00,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:06:00,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:06:00,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:06:00,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (1/1) ... [2022-12-14 13:06:00,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:06:00,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:00,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:06:00,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:06:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:06:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 13:06:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-12-14 13:06:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:06:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:06:00,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:06:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-12-14 13:06:00,739 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:06:00,741 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:06:01,086 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:06:01,091 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:06:01,091 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 13:06:01,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:06:01 BoogieIcfgContainer [2022-12-14 13:06:01,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:06:01,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:06:01,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:06:01,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:06:01,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:06:00" (1/3) ... [2022-12-14 13:06:01,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fd1675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:06:01, skipping insertion in model container [2022-12-14 13:06:01,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:06:00" (2/3) ... [2022-12-14 13:06:01,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fd1675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:06:01, skipping insertion in model container [2022-12-14 13:06:01,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:06:01" (3/3) ... [2022-12-14 13:06:01,108 INFO L112 eAbstractionObserver]: Analyzing ICFG indp4.c [2022-12-14 13:06:01,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:06:01,131 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:06:01,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:06:01,184 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;@4ec0b4a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:06:01,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:06:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:06:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:06:01,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:01,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:01,193 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2022-12-14 13:06:01,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:06:01,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758857670] [2022-12-14 13:06:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:01,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:01,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:06:01,208 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:06:01,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 13:06:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 13:06:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:01,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:01,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:06:01,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758857670] [2022-12-14 13:06:01,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758857670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:01,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:06:01,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:06:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798810130] [2022-12-14 13:06:01,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:01,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 13:06:01,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:06:01,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 13:06:01,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:06:01,360 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-12-14 13:06:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:01,373 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-12-14 13:06:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 13:06:01,374 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2022-12-14 13:06:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:01,381 INFO L225 Difference]: With dead ends: 44 [2022-12-14 13:06:01,381 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 13:06:01,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:06:01,387 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:01,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:06:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 13:06:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 13:06:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:06:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 13:06:01,410 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-12-14 13:06:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:01,411 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 13:06:01,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-12-14 13:06:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 13:06:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:06:01,411 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:01,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:01,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:06:01,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:01,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:01,613 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2022-12-14 13:06:01,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:06:01,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788237745] [2022-12-14 13:06:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:01,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:01,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:06:01,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:06:01,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 13:06:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:06:01,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:01,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:01,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:06:01,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788237745] [2022-12-14 13:06:01,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788237745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:01,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:06:01,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:06:01,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892623462] [2022-12-14 13:06:01,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:01,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:06:01,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:06:01,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:06:01,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:06:01,835 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-12-14 13:06:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:02,173 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-12-14 13:06:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:06:02,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2022-12-14 13:06:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:02,180 INFO L225 Difference]: With dead ends: 45 [2022-12-14 13:06:02,180 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 13:06:02,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:02,182 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:02,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:06:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 13:06:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-12-14 13:06:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2022-12-14 13:06:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-14 13:06:02,187 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-12-14 13:06:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:02,187 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-14 13:06:02,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-12-14 13:06:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-14 13:06:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 13:06:02,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:02,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:02,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-12-14 13:06:02,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:02,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2022-12-14 13:06:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:06:02,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848643441] [2022-12-14 13:06:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:02,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:02,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:06:02,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:06:02,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 13:06:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:02,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:06:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:02,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 13:06:02,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:02,818 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 1 case distinctions, treesize of input 59 treesize of output 29 [2022-12-14 13:06:02,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:02,880 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 1 case distinctions, treesize of input 59 treesize of output 29 [2022-12-14 13:06:02,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:02,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 27 [2022-12-14 13:06:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:02,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:03,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-12-14 13:06:03,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 89 [2022-12-14 13:06:04,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 13:06:04,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2022-12-14 13:06:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:04,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:06:04,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848643441] [2022-12-14 13:06:04,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848643441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:04,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1223336543] [2022-12-14 13:06:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:04,981 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:06:04,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:06:04,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:06:04,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 13:06:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:05,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:06:05,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:05,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:05,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 13:06:05,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:05,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:05,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-12-14 13:06:05,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:05,865 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:05,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-12-14 13:06:06,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:06,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2022-12-14 13:06:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:06,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:06,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-12-14 13:06:06,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 190 [2022-12-14 13:06:06,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 13:06:06,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2022-12-14 13:06:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:06,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1223336543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:06,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575378986] [2022-12-14 13:06:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:06,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:06,562 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:06,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:06:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:06,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:06:06,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:06,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:06,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 13:06:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:06,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:06,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-12-14 13:06:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:07,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:07,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-12-14 13:06:07,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:07,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2022-12-14 13:06:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:07,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:07,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-12-14 13:06:07,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 89 [2022-12-14 13:06:07,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 13:06:07,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2022-12-14 13:06:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:07,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575378986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:07,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:06:07,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 7, 7] total 14 [2022-12-14 13:06:07,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44325796] [2022-12-14 13:06:07,638 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:06:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 13:06:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:06:07,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 13:06:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:06:07,640 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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) [2022-12-14 13:06:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:11,278 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-12-14 13:06:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:06:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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 20 [2022-12-14 13:06:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:11,279 INFO L225 Difference]: With dead ends: 69 [2022-12-14 13:06:11,279 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 13:06:11,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:06:11,280 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:11,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 73 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 13:06:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 13:06:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 42. [2022-12-14 13:06:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 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) [2022-12-14 13:06:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-12-14 13:06:11,291 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 20 [2022-12-14 13:06:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:11,292 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-12-14 13:06:11,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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) [2022-12-14 13:06:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-12-14 13:06:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:06:11,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:11,293 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:11,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 13:06:11,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:06:11,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 13:06:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:11,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:11,898 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2022-12-14 13:06:11,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:06:11,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232224591] [2022-12-14 13:06:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:11,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:06:11,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:06:11,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 13:06:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:06:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:06:12,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:06:12,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:06:12,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232224591] [2022-12-14 13:06:12,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232224591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:12,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [460125483] [2022-12-14 13:06:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:12,462 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:06:12,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:06:12,463 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:06:12,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 13:06:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 13:06:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:06:12,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:06:12,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [460125483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273228804] [2022-12-14 13:06:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:12,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:12,898 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:12,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:06:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:13,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 13:06:13,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:06:13,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:06:13,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273228804] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:13,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:06:13,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8, 7, 8, 7] total 17 [2022-12-14 13:06:13,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722461403] [2022-12-14 13:06:13,196 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:06:13,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 13:06:13,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:06:13,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 13:06:13,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:06:13,197 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 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) [2022-12-14 13:06:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:14,013 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2022-12-14 13:06:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:06:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 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 24 [2022-12-14 13:06:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:14,020 INFO L225 Difference]: With dead ends: 107 [2022-12-14 13:06:14,020 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 13:06:14,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:06:14,021 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 166 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:14,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 57 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:06:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 13:06:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2022-12-14 13:06:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 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) [2022-12-14 13:06:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-12-14 13:06:14,029 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 24 [2022-12-14 13:06:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:14,029 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-12-14 13:06:14,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 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) [2022-12-14 13:06:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-12-14 13:06:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:06:14,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:14,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:14,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:06:14,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-12-14 13:06:14,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 13:06:14,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:14,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:14,634 INFO L85 PathProgramCache]: Analyzing trace with hash 900948378, now seen corresponding path program 2 times [2022-12-14 13:06:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:06:14,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100915841] [2022-12-14 13:06:14,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:06:14,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:14,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:06:14,639 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:06:14,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 13:06:14,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:06:14,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:06:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:06:15,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:06:15,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:06:15,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100915841] [2022-12-14 13:06:15,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100915841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:15,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1253031361] [2022-12-14 13:06:15,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:06:15,747 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:06:15,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:06:15,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:06:15,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-12-14 13:06:16,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:06:16,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:06:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:06:16,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:06:16,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1253031361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760834854] [2022-12-14 13:06:16,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:06:16,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:16,420 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:16,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:06:16,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:06:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 13:06:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:06:16,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:06:16,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760834854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:16,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:06:16,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9, 7, 8, 7] total 29 [2022-12-14 13:06:16,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959613412] [2022-12-14 13:06:16,839 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:06:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 13:06:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:06:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 13:06:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2022-12-14 13:06:16,841 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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) [2022-12-14 13:06:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:18,549 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2022-12-14 13:06:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 13:06:18,549 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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 24 [2022-12-14 13:06:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:18,551 INFO L225 Difference]: With dead ends: 143 [2022-12-14 13:06:18,551 INFO L226 Difference]: Without dead ends: 118 [2022-12-14 13:06:18,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 13:06:18,553 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 429 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:18,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 136 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 13:06:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-14 13:06:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 83. [2022-12-14 13:06:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 82 states have internal predecessors, (98), 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) [2022-12-14 13:06:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2022-12-14 13:06:18,565 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 24 [2022-12-14 13:06:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:18,565 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2022-12-14 13:06:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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) [2022-12-14 13:06:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2022-12-14 13:06:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 13:06:18,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:18,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:18,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2022-12-14 13:06:18,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 13:06:18,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:06:19,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:19,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:19,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1587482582, now seen corresponding path program 3 times [2022-12-14 13:06:19,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:06:19,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025059995] [2022-12-14 13:06:19,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:06:19,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:19,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:06:19,174 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:06:19,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 13:06:19,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:06:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:19,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:06:19,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:19,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:20,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:06:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025059995] [2022-12-14 13:06:20,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025059995] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1312351987] [2022-12-14 13:06:20,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:06:20,414 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:06:20,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:06:20,415 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:06:20,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 13:06:20,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:06:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784684190] [2022-12-14 13:06:20,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:06:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:20,800 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:20,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:06:20,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 1 [2022-12-14 13:06:21,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:06:21,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:06:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:21,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:22,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784684190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:22,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 13:06:22,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11, 11] total 34 [2022-12-14 13:06:22,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134631224] [2022-12-14 13:06:22,306 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 13:06:22,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 13:06:22,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:06:22,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 13:06:22,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 13:06:22,308 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 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) [2022-12-14 13:06:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:24,137 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2022-12-14 13:06:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 13:06:24,142 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 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 28 [2022-12-14 13:06:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:24,143 INFO L225 Difference]: With dead ends: 144 [2022-12-14 13:06:24,143 INFO L226 Difference]: Without dead ends: 118 [2022-12-14 13:06:24,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 13:06:24,144 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:24,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 158 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 13:06:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-14 13:06:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2022-12-14 13:06:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 89 states have internal predecessors, (103), 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) [2022-12-14 13:06:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2022-12-14 13:06:24,156 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 28 [2022-12-14 13:06:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:24,156 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2022-12-14 13:06:24,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 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) [2022-12-14 13:06:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2022-12-14 13:06:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 13:06:24,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:24,157 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:24,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 13:06:24,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 13:06:24,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:24,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash -227434410, now seen corresponding path program 4 times [2022-12-14 13:06:24,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:06:24,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941241232] [2022-12-14 13:06:24,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:06:24,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:24,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:06:24,564 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:06:24,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 13:06:24,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:06:24,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:06:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:25,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:25,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:06:25,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941241232] [2022-12-14 13:06:25,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941241232] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:25,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1911830222] [2022-12-14 13:06:25,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:06:25,901 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:06:25,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:06:25,902 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:06:25,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 13:06:26,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:06:26,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:26,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:06:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:26,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:26,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1911830222] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842310531] [2022-12-14 13:06:26,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:06:26,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:26,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:26,670 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:26,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:06:26,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:06:26,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:06:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:27,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:27,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842310531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:27,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:06:27,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13, 11, 14, 11] total 30 [2022-12-14 13:06:27,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892744783] [2022-12-14 13:06:27,219 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:06:27,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 13:06:27,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:06:27,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 13:06:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-12-14 13:06:27,221 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 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) [2022-12-14 13:06:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:29,120 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-12-14 13:06:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 13:06:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 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 28 [2022-12-14 13:06:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:29,121 INFO L225 Difference]: With dead ends: 137 [2022-12-14 13:06:29,121 INFO L226 Difference]: Without dead ends: 122 [2022-12-14 13:06:29,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=480, Invalid=1682, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 13:06:29,122 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 356 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:29,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 191 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 13:06:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-14 13:06:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2022-12-14 13:06:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:06:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2022-12-14 13:06:29,142 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 28 [2022-12-14 13:06:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:29,142 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2022-12-14 13:06:29,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 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) [2022-12-14 13:06:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2022-12-14 13:06:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 13:06:29,143 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:29,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:29,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-12-14 13:06:29,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 13:06:29,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 13:06:29,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:29,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 2 times [2022-12-14 13:06:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:06:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521534144] [2022-12-14 13:06:29,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:06:29,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:29,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:06:29,751 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:06:29,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 13:06:30,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:06:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:30,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:06:30,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:30,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 13:06:30,244 INFO L321 Elim1Store]: treesize reduction 106, result has 15.2 percent of original size [2022-12-14 13:06:30,245 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 44 treesize of output 50 [2022-12-14 13:06:30,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:30,292 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 1 case distinctions, treesize of input 71 treesize of output 35 [2022-12-14 13:06:30,417 INFO L321 Elim1Store]: treesize reduction 106, result has 15.2 percent of original size [2022-12-14 13:06:30,417 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 54 treesize of output 60 [2022-12-14 13:06:30,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:30,473 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 1 case distinctions, treesize of input 81 treesize of output 45 [2022-12-14 13:06:30,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:30,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 57 [2022-12-14 13:06:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:30,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:36,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 13:06:36,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-12-14 13:06:37,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 13:06:37,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-12-14 13:06:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:40,180 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:06:40,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521534144] [2022-12-14 13:06:40,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521534144] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:40,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1422049599] [2022-12-14 13:06:40,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:06:40,181 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:06:40,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:06:40,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:06:40,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 13:06:41,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:06:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:06:41,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:41,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 13:06:41,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:41,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:41,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:41,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:41,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:41,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2022-12-14 13:06:41,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:41,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 35 [2022-12-14 13:06:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:42,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:42,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 60 [2022-12-14 13:06:42,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:42,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2022-12-14 13:06:42,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:42,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 57 [2022-12-14 13:06:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:42,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:51,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 13:06:51,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2022-12-14 13:06:51,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 13:06:51,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-12-14 13:06:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:52,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1422049599] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298169401] [2022-12-14 13:06:52,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:06:52,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:52,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:52,351 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:52,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:06:52,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:06:52,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:52,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 13:06:52,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:52,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 13:06:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:52,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:52,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2022-12-14 13:06:52,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:52,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 35 [2022-12-14 13:06:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:53,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:06:53,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:53,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 60 [2022-12-14 13:06:53,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:53,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2022-12-14 13:06:53,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:06:53,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 57 [2022-12-14 13:06:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:06:53,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:07:05,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 13:07:05,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-12-14 13:07:06,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 13:07:06,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-12-14 13:07:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:07:06,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298169401] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:07:06,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:07:06,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14, 16, 15, 16] total 41 [2022-12-14 13:07:06,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002888033] [2022-12-14 13:07:06,978 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:07:06,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 13:07:06,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:07:06,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 13:07:06,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1447, Unknown=6, NotChecked=0, Total=1640 [2022-12-14 13:07:06,980 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 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) [2022-12-14 13:07:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:07:15,439 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2022-12-14 13:07:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 13:07:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 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 30 [2022-12-14 13:07:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:07:15,440 INFO L225 Difference]: With dead ends: 101 [2022-12-14 13:07:15,440 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 13:07:15,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 126 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=411, Invalid=3243, Unknown=6, NotChecked=0, Total=3660 [2022-12-14 13:07:15,442 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:07:15,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 169 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 13:07:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 13:07:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2022-12-14 13:07:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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) [2022-12-14 13:07:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-12-14 13:07:15,456 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 30 [2022-12-14 13:07:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:07:15,456 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-12-14 13:07:15,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 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) [2022-12-14 13:07:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-12-14 13:07:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 13:07:15,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:07:15,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:07:15,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-12-14 13:07:15,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 13:07:15,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 13:07:16,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:07:16,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:07:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:07:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 5 times [2022-12-14 13:07:16,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:07:16,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406844238] [2022-12-14 13:07:16,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:07:16,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:07:16,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:07:16,065 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:07:16,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c027724e-a03d-43d0-8cc6-b260cf3b139d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 13:07:16,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 13:07:16,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:07:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 13:07:16,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:07:16,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:16,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 40 [2022-12-14 13:07:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:17,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:17,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:17,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:17,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:17,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2022-12-14 13:07:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:18,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 41 [2022-12-14 13:07:18,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:18,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 58 [2022-12-14 13:07:18,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:18,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2022-12-14 13:07:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:18,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:18,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 41 [2022-12-14 13:07:18,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:18,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 58 [2022-12-14 13:07:19,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:19,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:19,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2022-12-14 13:07:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:07:19,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:19,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 41 [2022-12-14 13:07:19,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:19,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2022-12-14 13:07:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:07:19,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:07:25,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 157 [2022-12-14 13:07:25,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:07:25,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53927900 treesize of output 53731292