./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sqm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sqm.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7 --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 950fd5ff5cc9d2c5e3d846192e43f4963ef3abd0ec7056eb5d764989d48b2064 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:59:44,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:59:44,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:59:44,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:59:44,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:59:44,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:59:44,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:59:44,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:59:44,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:59:44,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:59:44,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:59:44,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:59:44,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:59:44,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:59:44,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:59:44,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:59:44,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:59:44,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:59:44,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:59:44,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:59:44,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:59:44,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:59:44,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:59:44,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:59:44,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:59:44,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:59:44,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:59:44,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:59:44,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:59:44,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:59:44,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:59:44,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:59:44,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:59:44,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:59:44,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:59:44,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:59:44,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:59:44,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:59:44,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:59:44,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:59:44,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:59:44,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:59:44,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:59:44,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:59:44,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:59:44,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:59:44,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:59:44,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:59:44,648 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:59:44,648 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:59:44,648 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:59:44,649 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:59:44,650 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:59:44,650 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:59:44,650 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:59:44,651 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:59:44,651 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:59:44,651 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:59:44,651 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:59:44,652 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:59:44,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:59:44,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:59:44,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:59:44,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:59:44,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:59:44,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:59:44,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:59:44,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:59:44,654 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:59:44,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:59:44,655 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:59:44,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:59:44,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:59:44,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:59:44,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:59:44,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:59:44,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:59:44,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:59:44,657 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:59:44,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:59:44,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:59:44,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:59:44,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:59:44,658 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 950fd5ff5cc9d2c5e3d846192e43f4963ef3abd0ec7056eb5d764989d48b2064 [2021-11-25 17:59:44,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:59:44,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:59:44,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:59:44,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:59:44,969 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:59:44,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/sqm.c [2021-11-25 17:59:45,038 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/data/8a4fc9d83/ae3e8d886f994b9fa6a9c53ac36b9cfc/FLAGc8fff1269 [2021-11-25 17:59:45,523 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:59:45,523 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/sv-benchmarks/c/array-fpi/sqm.c [2021-11-25 17:59:45,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/data/8a4fc9d83/ae3e8d886f994b9fa6a9c53ac36b9cfc/FLAGc8fff1269 [2021-11-25 17:59:45,880 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/data/8a4fc9d83/ae3e8d886f994b9fa6a9c53ac36b9cfc [2021-11-25 17:59:45,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:59:45,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:59:45,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:59:45,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:59:45,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:59:45,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:45" (1/1) ... [2021-11-25 17:59:45,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791599d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:45, skipping insertion in model container [2021-11-25 17:59:45,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:45" (1/1) ... [2021-11-25 17:59:45,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:59:45,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:59:46,108 WARN L230 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_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/sv-benchmarks/c/array-fpi/sqm.c[586,599] [2021-11-25 17:59:46,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:59:46,134 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:59:46,146 WARN L230 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_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/sv-benchmarks/c/array-fpi/sqm.c[586,599] [2021-11-25 17:59:46,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:59:46,168 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:59:46,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46 WrapperNode [2021-11-25 17:59:46,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:59:46,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:59:46,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:59:46,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:59:46,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,205 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-11-25 17:59:46,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:59:46,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:59:46,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:59:46,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:59:46,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:59:46,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:59:46,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:59:46,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:59:46,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (1/1) ... [2021-11-25 17:59:46,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:59:46,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:46,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:59:46,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:59:46,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:59:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:59:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 17:59:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 17:59:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:59:46,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:59:46,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 17:59:46,371 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:59:46,372 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:59:46,537 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:59:46,600 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:59:46,600 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 17:59:46,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:59:46 BoogieIcfgContainer [2021-11-25 17:59:46,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:59:46,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:59:46,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:59:46,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:59:46,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:59:45" (1/3) ... [2021-11-25 17:59:46,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a47f065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:59:46, skipping insertion in model container [2021-11-25 17:59:46,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:46" (2/3) ... [2021-11-25 17:59:46,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a47f065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:59:46, skipping insertion in model container [2021-11-25 17:59:46,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:59:46" (3/3) ... [2021-11-25 17:59:46,625 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm.c [2021-11-25 17:59:46,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:59:46,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:59:46,675 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:59:46,683 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:59:46,683 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:59:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-11-25 17:59:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 17:59:46,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:46,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:46,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:46,725 INFO L85 PathProgramCache]: Analyzing trace with hash -735732333, now seen corresponding path program 1 times [2021-11-25 17:59:46,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:46,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841802791] [2021-11-25 17:59:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:46,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:46,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:59:46,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901653803] [2021-11-25 17:59:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:46,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:46,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:46,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:46,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:59:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 17:59:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:47,162 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-11-25 17:59:47,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 36 treesize of output 51 [2021-11-25 17:59:47,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 17:59:47,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 17:59:47,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 3 [2021-11-25 17:59:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:47,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:59:47,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:47,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841802791] [2021-11-25 17:59:47,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:59:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901653803] [2021-11-25 17:59:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901653803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:47,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:47,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:59:47,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28973333] [2021-11-25 17:59:47,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:47,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:47,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:47,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:47,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:47,648 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:47,785 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-25 17:59:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:47,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 17:59:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:47,797 INFO L225 Difference]: With dead ends: 35 [2021-11-25 17:59:47,798 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 17:59:47,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:59:47,808 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:47,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 17:59:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2021-11-25 17:59:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2021-11-25 17:59:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-11-25 17:59:47,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2021-11-25 17:59:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:47,846 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-11-25 17:59:47,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-11-25 17:59:47,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 17:59:47,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:47,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:47,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:48,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 17:59:48,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:48,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1337635293, now seen corresponding path program 1 times [2021-11-25 17:59:48,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:48,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589783758] [2021-11-25 17:59:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:48,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:48,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:59:48,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144765169] [2021-11-25 17:59:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:48,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:48,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:48,129 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:48,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:59:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:59:48,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:48,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:59:48,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589783758] [2021-11-25 17:59:48,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:59:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144765169] [2021-11-25 17:59:48,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144765169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:48,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:48,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:48,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847357853] [2021-11-25 17:59:48,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:48,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:59:48,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:48,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:59:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:59:48,245 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-25 17:59:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:48,288 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-11-25 17:59:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:59:48,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 [2021-11-25 17:59:48,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:48,290 INFO L225 Difference]: With dead ends: 25 [2021-11-25 17:59:48,290 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 17:59:48,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:48,292 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:48,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:59:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 17:59:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2021-11-25 17:59:48,297 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) [2021-11-25 17:59:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-25 17:59:48,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-11-25 17:59:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:48,298 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-25 17:59:48,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-25 17:59:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-25 17:59:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 17:59:48,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:48,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:48,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:48,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:48,526 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1611921030, now seen corresponding path program 1 times [2021-11-25 17:59:48,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:48,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159376557] [2021-11-25 17:59:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:48,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:48,568 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:59:48,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812983084] [2021-11-25 17:59:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:48,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:48,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:48,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:48,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:59:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:48,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:59:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:48,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:48,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:48,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159376557] [2021-11-25 17:59:48,743 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:59:48,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812983084] [2021-11-25 17:59:48,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812983084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:48,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481877470] [2021-11-25 17:59:48,769 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 17:59:48,769 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:59:48,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:59:48,781 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:59:48,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:59:48,967 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 17:59:48,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 17:59:49,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2021-11-25 17:59:49,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 17:59:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 112 [2021-11-25 17:59:49,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:49,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,613 INFO L354 Elim1Store]: treesize reduction 255, result has 11.8 percent of original size [2021-11-25 17:59:49,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 33 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 39 case distinctions, treesize of input 494 treesize of output 511 [2021-11-25 17:59:49,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:49,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 17:59:49,957 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:59:50,278 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) (= |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) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 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_main_#t~mem13#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_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 17:59:50,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:59:50,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 17:59:50,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-25 17:59:50,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070284307] [2021-11-25 17:59:50,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 17:59:50,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:59:50,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:50,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:59:50,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-25 17:59:50,280 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:50,382 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-25 17:59:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 17:59:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 17:59:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:50,383 INFO L225 Difference]: With dead ends: 29 [2021-11-25 17:59:50,383 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 17:59:50,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:59:50,385 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:50,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 17:59:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2021-11-25 17:59:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-11-25 17:59:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-25 17:59:50,389 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-11-25 17:59:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:50,394 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-25 17:59:50,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-25 17:59:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 17:59:50,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:50,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:50,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:50,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 17:59:50,600 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1565286172, now seen corresponding path program 1 times [2021-11-25 17:59:50,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:50,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787166335] [2021-11-25 17:59:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:50,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:50,641 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:59:50,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006535107] [2021-11-25 17:59:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:50,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:50,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:50,663 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:50,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 17:59:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 17:59:50,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:50,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 17:59:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:50,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 17:59:50,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 17:59:50,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 17:59:50,843 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 17:59:50,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 17:59:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:50,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:51,072 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_115 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_115) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2021-11-25 17:59:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-25 17:59:51,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:51,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787166335] [2021-11-25 17:59:51,100 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:59:51,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006535107] [2021-11-25 17:59:51,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006535107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:51,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907689025] [2021-11-25 17:59:51,108 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 17:59:51,108 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:59:51,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:59:51,109 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:59:51,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:59:51,203 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-25 17:59:51,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 109 [2021-11-25 17:59:51,322 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 17:59:51,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 17:59:51,457 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 17:59:51,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 17:59:51,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 17:59:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:59:51,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 109 [2021-11-25 17:59:51,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 17:59:51,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:51,617 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 17:59:51,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 27 [2021-11-25 17:59:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:51,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:51,741 INFO L354 Elim1Store]: treesize reduction 270, result has 9.7 percent of original size [2021-11-25 17:59:51,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 123 treesize of output 154 [2021-11-25 17:59:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:51,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:51,809 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 17:59:51,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 17:59:51,842 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:59:52,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '368#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |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) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 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_main_#t~mem13#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_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 17:59:52,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:59:52,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 17:59:52,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-25 17:59:52,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286468933] [2021-11-25 17:59:52,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 17:59:52,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 17:59:52,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:52,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 17:59:52,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=149, Unknown=1, NotChecked=24, Total=210 [2021-11-25 17:59:52,234 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-11-25 17:59:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:52,398 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-25 17:59:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:59:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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 [2021-11-25 17:59:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:52,403 INFO L225 Difference]: With dead ends: 30 [2021-11-25 17:59:52,403 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 17:59:52,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=245, Unknown=1, NotChecked=32, Total=342 [2021-11-25 17:59:52,405 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:52,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 17 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-11-25 17:59:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 17:59:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 15. [2021-11-25 17:59:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2021-11-25 17:59:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-25 17:59:52,410 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2021-11-25 17:59:52,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:52,410 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-25 17:59:52,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-11-25 17:59:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-25 17:59:52,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 17:59:52,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:52,411 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:52,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:52,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:52,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:52,612 INFO L85 PathProgramCache]: Analyzing trace with hash -978676906, now seen corresponding path program 1 times [2021-11-25 17:59:52,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:52,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388474848] [2021-11-25 17:59:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:52,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:52,629 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:59:52,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311810715] [2021-11-25 17:59:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:52,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:52,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:52,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:52,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 17:59:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:52,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:59:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:52,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:59:52,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388474848] [2021-11-25 17:59:52,755 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:59:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311810715] [2021-11-25 17:59:52,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311810715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:52,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:52,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:59:52,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768863030] [2021-11-25 17:59:52,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:52,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:59:52,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:59:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:59:52,757 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:52,809 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-25 17:59:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 17:59:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:52,811 INFO L225 Difference]: With dead ends: 29 [2021-11-25 17:59:52,811 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 17:59:52,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:59:52,814 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:52,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:59:52,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 17:59:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2021-11-25 17:59:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-11-25 17:59:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-25 17:59:52,820 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2021-11-25 17:59:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:52,820 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-25 17:59:52,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-25 17:59:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 17:59:52,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:52,821 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:52,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:53,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:53,046 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:53,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:53,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1274461626, now seen corresponding path program 2 times [2021-11-25 17:59:53,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:53,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735178060] [2021-11-25 17:59:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:53,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:53,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:59:53,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322268492] [2021-11-25 17:59:53,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:59:53,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:53,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:53,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 17:59:53,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 17:59:53,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:59:53,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:59:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:53,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:53,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735178060] [2021-11-25 17:59:53,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:59:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322268492] [2021-11-25 17:59:53,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322268492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:53,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892588384] [2021-11-25 17:59:53,258 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 17:59:53,258 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:59:53,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:59:53,259 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:59:53,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:59:53,344 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-25 17:59:53,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 109 [2021-11-25 17:59:53,457 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 17:59:53,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 17:59:53,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 17:59:53,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 112 [2021-11-25 17:59:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:53,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,835 INFO L354 Elim1Store]: treesize reduction 255, result has 11.8 percent of original size [2021-11-25 17:59:53,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 33 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 39 case distinctions, treesize of input 500 treesize of output 513 [2021-11-25 17:59:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 17:59:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:53,983 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 17:59:53,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 27 [2021-11-25 17:59:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:54,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:54,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:54,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:54,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:54,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:54,123 INFO L354 Elim1Store]: treesize reduction 265, result has 11.4 percent of original size [2021-11-25 17:59:54,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 148 treesize of output 184 [2021-11-25 17:59:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:54,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:54,184 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 17:59:54,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 17:59:54,213 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:59:54,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '607#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |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_main_~b~0#1.offset| 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_main_#t~mem13#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_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 17:59:54,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:59:54,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 17:59:54,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 17:59:54,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321644443] [2021-11-25 17:59:54,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 17:59:54,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:59:54,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:59:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-25 17:59:54,480 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:54,586 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-25 17:59:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:54,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 17:59:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:54,587 INFO L225 Difference]: With dead ends: 33 [2021-11-25 17:59:54,587 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 17:59:54,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:59:54,588 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:54,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:54,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 17:59:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-11-25 17:59:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-25 17:59:54,592 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-11-25 17:59:54,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:54,592 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-25 17:59:54,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-25 17:59:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 17:59:54,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:54,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:54,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:54,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:54,806 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:54,806 INFO L85 PathProgramCache]: Analyzing trace with hash -746752909, now seen corresponding path program 3 times [2021-11-25 17:59:54,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:54,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111872383] [2021-11-25 17:59:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:54,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:54,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:59:54,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332263911] [2021-11-25 17:59:54,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:59:54,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:54,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:54,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:54,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 17:59:55,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:59:55,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:59:55,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 17:59:55,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:55,163 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-11-25 17:59:55,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 36 treesize of output 51 [2021-11-25 17:59:55,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 17:59:55,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 17:59:55,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 3 [2021-11-25 17:59:55,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 17:59:55,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2021-11-25 17:59:55,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 17:59:55,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 17:59:55,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 17:59:55,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 57 [2021-11-25 17:59:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:55,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:55,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 68 [2021-11-25 17:59:55,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 17:59:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:55,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 26 [2021-11-25 17:59:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:55,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 17:59:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:55,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:55,822 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_218 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2021-11-25 17:59:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-11-25 17:59:55,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:55,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111872383] [2021-11-25 17:59:55,840 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:59:55,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332263911] [2021-11-25 17:59:55,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332263911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:55,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406974677] [2021-11-25 17:59:55,843 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 17:59:55,843 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:59:55,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:59:55,844 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:59:55,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:59:55,955 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 17:59:55,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 17:59:56,031 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-25 17:59:56,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 109 [2021-11-25 17:59:56,161 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 17:59:56,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 17:59:56,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 17:59:56,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:59:56,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 109 [2021-11-25 17:59:56,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 17:59:56,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:56,321 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 17:59:56,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 27 [2021-11-25 17:59:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:56,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:56,441 INFO L354 Elim1Store]: treesize reduction 270, result has 9.7 percent of original size [2021-11-25 17:59:56,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 123 treesize of output 154 [2021-11-25 17:59:56,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:56,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:56,512 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 17:59:56,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 17:59:56,544 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:59:56,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '764#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |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) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 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_main_#t~mem13#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_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 17:59:56,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:59:56,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 17:59:56,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-11-25 17:59:56,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133244936] [2021-11-25 17:59:56,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 17:59:56,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 17:59:56,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:56,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 17:59:56,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=248, Unknown=1, NotChecked=32, Total=342 [2021-11-25 17:59:56,920 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2021-11-25 17:59:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:57,108 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2021-11-25 17:59:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 17:59:57,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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 [2021-11-25 17:59:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:57,109 INFO L225 Difference]: With dead ends: 28 [2021-11-25 17:59:57,109 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 17:59:57,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=376, Unknown=1, NotChecked=40, Total=506 [2021-11-25 17:59:57,111 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:57,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-11-25 17:59:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 17:59:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2021-11-25 17:59:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-25 17:59:57,117 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 11 [2021-11-25 17:59:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:57,117 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-25 17:59:57,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2021-11-25 17:59:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-25 17:59:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 17:59:57,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:57,118 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:57,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 17:59:57,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:57,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:57,323 INFO L85 PathProgramCache]: Analyzing trace with hash 985561389, now seen corresponding path program 1 times [2021-11-25 17:59:57,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:57,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232553429] [2021-11-25 17:59:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:57,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:57,365 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:59:57,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075121162] [2021-11-25 17:59:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:57,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:57,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:57,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:57,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 17:59:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 17:59:57,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:57,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 17:59:57,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:57,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 17:59:57,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 17:59:57,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 17:59:57,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:57,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 17:59:57,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:57,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-25 17:59:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:57,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:58,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232553429] [2021-11-25 17:59:58,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:59:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075121162] [2021-11-25 17:59:58,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075121162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:58,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369378871] [2021-11-25 17:59:58,383 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 17:59:58,383 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:59:58,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:59:58,383 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:59:58,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:59:58,512 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 17:59:58,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 17:59:58,620 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 17:59:58,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 17:59:58,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2021-11-25 17:59:58,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 17:59:58,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:59:58,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 109 [2021-11-25 17:59:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 17:59:58,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:58,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 17:59:58,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 27 [2021-11-25 17:59:58,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:58,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:58,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:58,950 INFO L354 Elim1Store]: treesize reduction 265, result has 11.4 percent of original size [2021-11-25 17:59:58,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 123 treesize of output 159 [2021-11-25 17:59:58,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:59,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:59,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:59,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 17:59:59,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 17:59:59,166 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:59:59,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '933#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#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___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 17:59:59,668 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:59:59,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 17:59:59,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-11-25 17:59:59,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129354952] [2021-11-25 17:59:59,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 17:59:59,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 17:59:59,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:59,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 17:59:59,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-11-25 17:59:59,670 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:00,025 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-25 18:00:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:00:00,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 18:00:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:00,026 INFO L225 Difference]: With dead ends: 33 [2021-11-25 18:00:00,026 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 18:00:00,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-11-25 18:00:00,027 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:00,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 69 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-11-25 18:00:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 18:00:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2021-11-25 18:00:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-11-25 18:00:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-25 18:00:00,033 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2021-11-25 18:00:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:00,034 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-25 18:00:00,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-25 18:00:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:00:00,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:00,035 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:00:00,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:00:00,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 18:00:00,245 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:00:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash -522629517, now seen corresponding path program 4 times [2021-11-25 18:00:00,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:00,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537976978] [2021-11-25 18:00:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:00,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:00,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:00:00,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825976607] [2021-11-25 18:00:00,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:00:00,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:00,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:00,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:00:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:00:00,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:00:00,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:00:00,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:00:00,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537976978] [2021-11-25 18:00:00,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:00:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825976607] [2021-11-25 18:00:00,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825976607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:00:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794327217] [2021-11-25 18:00:00,455 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:00:00,455 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:00:00,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:00:00,455 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:00:00,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:00:00,564 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 18:00:00,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 18:00:00,623 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-25 18:00:00,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 109 [2021-11-25 18:00:00,730 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:00:00,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:00:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:00:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:00:00,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 109 [2021-11-25 18:00:00,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:00:00,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:00,883 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:00,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:00,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:00,958 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:00:00,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 168 [2021-11-25 18:00:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:00,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:01,000 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:01,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:01,029 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:00:01,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1121#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |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) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 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_main_#t~mem13#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_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:00:01,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:00:01,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:00:01,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-25 18:00:01,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269377328] [2021-11-25 18:00:01,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:01,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:00:01,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:00:01,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:00:01,315 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:01,495 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-11-25 18:00:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:00:01,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:00:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:01,497 INFO L225 Difference]: With dead ends: 61 [2021-11-25 18:00:01,497 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 18:00:01,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:00:01,498 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:01,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 39 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:00:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 18:00:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-11-25 18:00:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2021-11-25 18:00:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-11-25 18:00:01,505 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 13 [2021-11-25 18:00:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:01,505 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-11-25 18:00:01,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-11-25 18:00:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:00:01,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:01,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:00:01,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:00:01,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:01,722 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:00:01,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash -76388954, now seen corresponding path program 2 times [2021-11-25 18:00:01,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:01,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370900364] [2021-11-25 18:00:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:01,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:01,745 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:00:01,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396922603] [2021-11-25 18:00:01,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:00:01,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:01,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:01,760 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:01,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:00:01,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:00:01,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:00:01,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:00:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:00:01,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:00:01,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:01,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370900364] [2021-11-25 18:00:01,897 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:00:01,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396922603] [2021-11-25 18:00:01,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396922603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:00:01,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740666949] [2021-11-25 18:00:01,899 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:00:01,899 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:00:01,899 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:00:01,900 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:00:01,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:00:02,025 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:00:02,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:00:02,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2021-11-25 18:00:02,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:00:02,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 25 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 156 [2021-11-25 18:00:02,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:02,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:02,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,317 INFO L354 Elim1Store]: treesize reduction 312, result has 0.3 percent of original size [2021-11-25 18:00:02,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 34 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 567 treesize of output 509 [2021-11-25 18:00:02,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:00:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:02,431 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:02,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:02,505 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:00:02,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2021-11-25 18:00:02,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:02,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:02,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:02,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:02,713 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:00:03,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |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___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:00:03,140 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:00:03,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:00:03,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 18:00:03,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094946566] [2021-11-25 18:00:03,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:03,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:00:03,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:00:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:00:03,142 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-11-25 18:00:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:03,242 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-11-25 18:00:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:00:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 [2021-11-25 18:00:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:03,243 INFO L225 Difference]: With dead ends: 38 [2021-11-25 18:00:03,243 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 18:00:03,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:00:03,244 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:03,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 21 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:00:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 18:00:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2021-11-25 18:00:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2021-11-25 18:00:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-11-25 18:00:03,250 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2021-11-25 18:00:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:03,250 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-11-25 18:00:03,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-11-25 18:00:03,251 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-11-25 18:00:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:00:03,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:03,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:00:03,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:00:03,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:00:03,468 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:00:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1419825270, now seen corresponding path program 3 times [2021-11-25 18:00:03,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:03,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608005205] [2021-11-25 18:00:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:03,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:03,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:00:03,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752639939] [2021-11-25 18:00:03,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:00:03,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:03,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:03,490 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:03,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:00:03,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:00:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:00:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-25 18:00:03,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:03,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:00:03,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:00:03,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 20 treesize of output 20 [2021-11-25 18:00:03,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:00:03,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:00:03,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 123 treesize of output 115 [2021-11-25 18:00:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:03,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 139 [2021-11-25 18:00:03,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:00:03,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 67 [2021-11-25 18:00:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:03,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 43 treesize of output 44 [2021-11-25 18:00:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:04,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2021-11-25 18:00:04,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:04,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:04,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:04,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2021-11-25 18:00:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:04,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:13,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:13,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608005205] [2021-11-25 18:00:13,856 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:00:13,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752639939] [2021-11-25 18:00:13,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752639939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:00:13,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697098857] [2021-11-25 18:00:13,858 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:00:13,858 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:00:13,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:00:13,859 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:00:13,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:00:13,975 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:00:13,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:00:13,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2021-11-25 18:00:14,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:00:14,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 112 [2021-11-25 18:00:14,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,288 INFO L354 Elim1Store]: treesize reduction 260, result has 10.0 percent of original size [2021-11-25 18:00:14,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 33 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 39 case distinctions, treesize of input 494 treesize of output 506 [2021-11-25 18:00:14,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:00:14,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,492 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:14,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 27 [2021-11-25 18:00:14,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,620 INFO L354 Elim1Store]: treesize reduction 270, result has 9.7 percent of original size [2021-11-25 18:00:14,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 148 treesize of output 179 [2021-11-25 18:00:14,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,692 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:14,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:14,804 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:00:15,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1556#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |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___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:00:15,706 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:00:15,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:00:15,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-25 18:00:15,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779706385] [2021-11-25 18:00:15,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:15,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 18:00:15,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:15,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 18:00:15,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=513, Unknown=3, NotChecked=0, Total=600 [2021-11-25 18:00:15,708 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:16,028 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-11-25 18:00:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:00:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 18:00:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:16,030 INFO L225 Difference]: With dead ends: 36 [2021-11-25 18:00:16,030 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 18:00:16,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=108, Invalid=645, Unknown=3, NotChecked=0, Total=756 [2021-11-25 18:00:16,031 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:16,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-11-25 18:00:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 18:00:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-11-25 18:00:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-25 18:00:16,039 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2021-11-25 18:00:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:16,039 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-25 18:00:16,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-25 18:00:16,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:00:16,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:16,040 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:00:16,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:00:16,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:16,245 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:00:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash 916648218, now seen corresponding path program 5 times [2021-11-25 18:00:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:16,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265424772] [2021-11-25 18:00:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:16,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:16,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:00:16,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422403354] [2021-11-25 18:00:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:00:16,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:16,286 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:16,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:00:16,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:00:16,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:00:16,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:00:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:16,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:16,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:16,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265424772] [2021-11-25 18:00:16,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:00:16,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422403354] [2021-11-25 18:00:16,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422403354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:00:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1817582757] [2021-11-25 18:00:16,639 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:00:16,639 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:00:16,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:00:16,640 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:00:16,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:00:16,752 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:00:16,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:00:16,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:00:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2021-11-25 18:00:16,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 112 [2021-11-25 18:00:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:16,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:16,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:16,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,059 INFO L354 Elim1Store]: treesize reduction 260, result has 10.0 percent of original size [2021-11-25 18:00:17,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 33 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 39 case distinctions, treesize of input 500 treesize of output 508 [2021-11-25 18:00:17,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:00:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:17,174 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:17,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:17,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:17,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:17,268 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:00:17,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2021-11-25 18:00:17,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:17,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:17,313 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:17,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:17,334 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:00:17,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1765#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |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_main_~b~0#1.offset| 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_main_#t~mem13#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_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:00:17,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:00:17,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:00:17,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-25 18:00:17,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579719493] [2021-11-25 18:00:17,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:17,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:00:17,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:00:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:00:17,622 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2021-11-25 18:00:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:17,890 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2021-11-25 18:00:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:00:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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 [2021-11-25 18:00:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:17,892 INFO L225 Difference]: With dead ends: 71 [2021-11-25 18:00:17,892 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 18:00:17,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:00:17,893 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:17,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 47 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:00:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 18:00:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-11-25 18:00:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 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) [2021-11-25 18:00:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-25 18:00:17,903 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2021-11-25 18:00:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:17,903 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-25 18:00:17,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2021-11-25 18:00:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-25 18:00:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:00:17,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:17,904 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:00:17,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:00:18,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:00:18,110 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:00:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1710382253, now seen corresponding path program 6 times [2021-11-25 18:00:18,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:18,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142276791] [2021-11-25 18:00:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:18,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:18,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:00:18,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133545769] [2021-11-25 18:00:18,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:00:18,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:18,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:18,160 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:18,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:00:19,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:00:19,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:00:19,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:00:19,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:19,254 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-11-25 18:00:19,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 36 treesize of output 51 [2021-11-25 18:00:19,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:00:19,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:00:19,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 18:00:19,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2021-11-25 18:00:19,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 3 [2021-11-25 18:00:19,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:00:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:00:19,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:00:19,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:00:19,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:00:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:19,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:00:19,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 57 [2021-11-25 18:00:19,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:19,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:19,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 68 [2021-11-25 18:00:19,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:00:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:19,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 26 [2021-11-25 18:00:19,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:19,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:00:19,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:19,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:00:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:19,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:20,398 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_509 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_509) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2021-11-25 18:00:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2021-11-25 18:00:20,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:20,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142276791] [2021-11-25 18:00:20,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:00:20,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133545769] [2021-11-25 18:00:20,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133545769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:00:20,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241513096] [2021-11-25 18:00:20,424 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:00:20,424 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:00:20,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:00:20,425 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:00:20,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:00:20,507 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-25 18:00:20,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 109 [2021-11-25 18:00:20,618 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:00:20,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:00:20,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:00:20,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 112 [2021-11-25 18:00:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:20,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:20,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:20,924 INFO L354 Elim1Store]: treesize reduction 260, result has 10.0 percent of original size [2021-11-25 18:00:20,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 33 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 39 case distinctions, treesize of input 500 treesize of output 508 [2021-11-25 18:00:21,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:21,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:00:21,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:21,052 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:21,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 27 [2021-11-25 18:00:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:21,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:21,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:21,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:21,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:21,170 INFO L354 Elim1Store]: treesize reduction 270, result has 9.7 percent of original size [2021-11-25 18:00:21,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 148 treesize of output 179 [2021-11-25 18:00:21,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:21,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:21,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:21,215 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:21,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:21,239 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:00:21,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2061#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |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_main_~b~0#1.offset| 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_main_#t~mem13#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_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:00:21,506 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:00:21,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:00:21,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-11-25 18:00:21,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332414546] [2021-11-25 18:00:21,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:21,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:00:21,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:21,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:00:21,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=441, Unknown=1, NotChecked=44, Total=600 [2021-11-25 18:00:21,509 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:24,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 18:00:26,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 18:00:28,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 18:00:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:28,922 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2021-11-25 18:00:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 18:00:28,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:00:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:28,923 INFO L225 Difference]: With dead ends: 72 [2021-11-25 18:00:28,923 INFO L226 Difference]: Without dead ends: 70 [2021-11-25 18:00:28,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=200, Invalid=858, Unknown=2, NotChecked=62, Total=1122 [2021-11-25 18:00:28,924 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:28,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 35 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 109 Invalid, 3 Unknown, 70 Unchecked, 7.1s Time] [2021-11-25 18:00:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-25 18:00:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2021-11-25 18:00:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 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) [2021-11-25 18:00:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-11-25 18:00:28,936 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 15 [2021-11-25 18:00:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:28,937 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-11-25 18:00:28,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-11-25 18:00:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:00:28,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:28,938 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:00:28,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:00:29,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:00:29,139 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:00:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:29,140 INFO L85 PathProgramCache]: Analyzing trace with hash 724259981, now seen corresponding path program 4 times [2021-11-25 18:00:29,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:29,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881667475] [2021-11-25 18:00:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:29,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:29,178 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:00:29,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027651562] [2021-11-25 18:00:29,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:00:29,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:29,206 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:29,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:00:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:00:29,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-25 18:00:29,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:29,669 INFO L354 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2021-11-25 18:00:29,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2021-11-25 18:00:29,698 INFO L354 Elim1Store]: treesize reduction 30, result has 43.4 percent of original size [2021-11-25 18:00:29,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 68 [2021-11-25 18:00:29,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:00:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:00:29,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:00:29,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-11-25 18:00:29,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:00:29,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 18:00:29,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2021-11-25 18:00:29,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:00:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-25 18:00:29,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 80 treesize of output 74 [2021-11-25 18:00:29,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 85 [2021-11-25 18:00:29,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:00:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:29,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 35 [2021-11-25 18:00:30,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:00:30,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 154 treesize of output 140 [2021-11-25 18:00:30,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:30,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 163 [2021-11-25 18:00:30,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:00:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 78 [2021-11-25 18:00:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 55 [2021-11-25 18:00:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:30,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 54 [2021-11-25 18:00:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:30,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:37,999 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_570 Int)) (or (let ((.cse19 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse9 (<= .cse19 2147483647)) (.cse1 (< 2147483647 .cse19)) (.cse0 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (and (or (<= .cse0 2147483647) (and (or .cse1 (let ((.cse5 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) (and (or (forall ((v_ArrVal_575 Int) (v_ArrVal_572 Int) (v_ArrVal_580 Int) (v_ArrVal_578 Int)) (= (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (select (store (store (let ((.cse4 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_570) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) (- 34359738368)) v_ArrVal_572) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8) (- 34359738368)) v_ArrVal_575))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse4) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse2 .cse3 (+ (select .cse4 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) 2)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16) v_ArrVal_578) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24) v_ArrVal_580) .cse3)) 4)) (<= .cse5 2147483647)) (or (forall ((v_ArrVal_575 Int) (v_ArrVal_572 Int) (v_ArrVal_580 Int) (v_ArrVal_578 Int)) (= 4 (let ((.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (select (store (store (let ((.cse8 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_570) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) v_ArrVal_572) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8) (- 34359738368)) v_ArrVal_575))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse6 .cse7 (+ (select .cse8 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) 2)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16) v_ArrVal_578) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24) v_ArrVal_580) .cse7)))) (< 2147483647 .cse5))))) (or .cse9 (forall ((v_ArrVal_575 Int) (v_ArrVal_572 Int) (v_ArrVal_580 Int) (v_ArrVal_578 Int)) (= (let ((.cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (select (store (store (let ((.cse12 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368)) v_ArrVal_570) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) (- 34359738368)) v_ArrVal_572) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8) (- 34359738368)) v_ArrVal_575))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse12) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse10 .cse11 (+ 2 (select .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse12 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16) v_ArrVal_578) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24) v_ArrVal_580) .cse11)) 4))))) (or (and (or .cse9 (forall ((v_ArrVal_575 Int) (v_ArrVal_572 Int) (v_ArrVal_580 Int) (v_ArrVal_578 Int)) (= 4 (let ((.cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (select (store (store (let ((.cse15 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368)) v_ArrVal_570) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) v_ArrVal_572) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8)) v_ArrVal_575))) (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse15) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse13 .cse14 (+ (select .cse13 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse15 |c_ULTIMATE.start_main_~b~0#1.offset|) 2)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16) v_ArrVal_578) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24) v_ArrVal_580) .cse14))))) (or .cse1 (forall ((v_ArrVal_575 Int) (v_ArrVal_572 Int) (v_ArrVal_580 Int) (v_ArrVal_578 Int)) (= 4 (let ((.cse17 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (select (store (store (let ((.cse18 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_570) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) v_ArrVal_572) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8)) v_ArrVal_575))) (let ((.cse16 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse18) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse16 .cse17 (+ (select .cse18 |c_ULTIMATE.start_main_~b~0#1.offset|) 2 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16) v_ArrVal_578) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24) v_ArrVal_580) .cse17)))))) (< 2147483647 .cse0))))) (let ((.cse22 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse20 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse21 (* .cse22 8))) (and (or (< v_ArrVal_570 (+ 2 (select .cse20 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse21)))) (< 2147483647 .cse22)) (or (< v_ArrVal_570 (+ 2 (select .cse20 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse21 (- 34359738368))))) (<= .cse22 2147483647))))))) is different from false [2021-11-25 18:00:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-25 18:00:38,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:38,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881667475] [2021-11-25 18:00:38,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:00:38,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027651562] [2021-11-25 18:00:38,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027651562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:00:38,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1963832731] [2021-11-25 18:00:38,211 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:00:38,212 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:00:38,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:00:38,212 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:00:38,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:00:38,320 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:00:38,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:00:38,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:00:38,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2021-11-25 18:00:38,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 25 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 156 [2021-11-25 18:00:38,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:38,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,596 INFO L354 Elim1Store]: treesize reduction 312, result has 0.3 percent of original size [2021-11-25 18:00:38,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 34 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 567 treesize of output 509 [2021-11-25 18:00:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:00:38,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:38,697 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:38,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:38,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:38,762 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:00:38,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2021-11-25 18:00:38,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:38,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:38,796 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:00:38,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:00:38,920 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:00:39,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2392#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |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___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:00:39,404 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:00:39,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:00:39,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-25 18:00:39,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665713632] [2021-11-25 18:00:39,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:39,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:00:39,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:00:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=656, Unknown=1, NotChecked=52, Total=812 [2021-11-25 18:00:39,407 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-11-25 18:00:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:39,794 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-11-25 18:00:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 18:00:39,794 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 16 [2021-11-25 18:00:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:39,796 INFO L225 Difference]: With dead ends: 63 [2021-11-25 18:00:39,796 INFO L226 Difference]: Without dead ends: 61 [2021-11-25 18:00:39,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=128, Invalid=805, Unknown=1, NotChecked=58, Total=992 [2021-11-25 18:00:39,798 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:39,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2021-11-25 18:00:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-25 18:00:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-11-25 18:00:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 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) [2021-11-25 18:00:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-11-25 18:00:39,809 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 16 [2021-11-25 18:00:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:39,810 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-11-25 18:00:39,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-11-25 18:00:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-11-25 18:00:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:00:39,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:39,811 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:00:39,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:00:40,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:40,026 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:00:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1181831571, now seen corresponding path program 5 times [2021-11-25 18:00:40,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:40,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057748753] [2021-11-25 18:00:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:40,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:40,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:00:40,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956122640] [2021-11-25 18:00:40,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:00:40,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:40,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:40,055 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:40,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:00:40,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:00:40,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:00:40,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-25 18:00:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:40,449 INFO L354 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2021-11-25 18:00:40,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2021-11-25 18:00:40,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-25 18:00:40,478 INFO L354 Elim1Store]: treesize reduction 23, result has 54.0 percent of original size [2021-11-25 18:00:40,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 69 [2021-11-25 18:00:40,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 15 [2021-11-25 18:00:40,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:00:40,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 3 [2021-11-25 18:00:40,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 18:00:40,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2021-11-25 18:00:40,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:00:40,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 123 treesize of output 115 [2021-11-25 18:00:40,712 INFO L354 Elim1Store]: treesize reduction 361, result has 12.2 percent of original size [2021-11-25 18:00:40,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 case distinctions, treesize of input 104 treesize of output 134 [2021-11-25 18:00:40,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:40,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:40,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 79 [2021-11-25 18:00:40,786 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-25 18:00:40,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2021-11-25 18:00:40,850 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-11-25 18:00:40,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 47 [2021-11-25 18:00:40,927 INFO L354 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2021-11-25 18:00:40,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 64 [2021-11-25 18:00:41,290 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-25 18:00:41,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 36 [2021-11-25 18:00:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:41,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:01:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:01:07,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057748753] [2021-11-25 18:01:07,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:01:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956122640] [2021-11-25 18:01:07,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956122640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:01:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313059208] [2021-11-25 18:01:07,531 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:01:07,531 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:01:07,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:01:07,531 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:01:07,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:01:07,625 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 18:01:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 18:01:07,720 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:01:07,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:01:07,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2021-11-25 18:01:07,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:01:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:01:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 109 [2021-11-25 18:01:07,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:01:07,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:07,876 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:01:07,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:01:07,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:07,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:07,939 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:01:07,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 168 [2021-11-25 18:01:07,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:07,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:07,971 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:01:07,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:01:08,106 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:01:09,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2706#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#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___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:01:09,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:01:09,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:01:09,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-25 18:01:09,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391289423] [2021-11-25 18:01:09,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:01:09,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:01:09,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:09,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:01:09,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=593, Unknown=2, NotChecked=0, Total=702 [2021-11-25 18:01:09,082 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-11-25 18:01:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:10,929 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-11-25 18:01:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:01:10,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 [2021-11-25 18:01:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:10,930 INFO L225 Difference]: With dead ends: 63 [2021-11-25 18:01:10,930 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 18:01:10,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=149, Invalid=779, Unknown=2, NotChecked=0, Total=930 [2021-11-25 18:01:10,931 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:10,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 32 Unchecked, 0.4s Time] [2021-11-25 18:01:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 18:01:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-25 18:01:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:01:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-11-25 18:01:10,941 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2021-11-25 18:01:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:10,941 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-11-25 18:01:10,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-11-25 18:01:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-11-25 18:01:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:01:10,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:10,942 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:01:10,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:01:11,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:01:11,158 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:11,158 INFO L85 PathProgramCache]: Analyzing trace with hash -622524324, now seen corresponding path program 7 times [2021-11-25 18:01:11,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:11,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275296349] [2021-11-25 18:01:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:11,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:11,179 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:01:11,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977670112] [2021-11-25 18:01:11,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:01:11,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:01:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:01:11,186 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:01:11,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:01:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 18:01:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:01:14,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:01:14,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 18:01:14,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:01:14,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:01:14,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:01:14,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:01:14,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:01:14,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:01:14,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 57 [2021-11-25 18:01:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 68 [2021-11-25 18:01:14,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 26 [2021-11-25 18:01:14,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 57 [2021-11-25 18:01:14,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 68 [2021-11-25 18:01:14,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2021-11-25 18:01:14,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:01:14,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 57 [2021-11-25 18:01:14,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 68 [2021-11-25 18:01:14,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:01:14,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 26 [2021-11-25 18:01:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:14,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:01:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:01:14,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:01:15,414 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_705 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_705) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2021-11-25 18:01:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 5 not checked. [2021-11-25 18:01:15,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:15,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275296349] [2021-11-25 18:01:15,439 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:01:15,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977670112] [2021-11-25 18:01:15,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977670112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:01:15,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607450255] [2021-11-25 18:01:15,441 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:01:15,441 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:01:15,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:01:15,441 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:01:15,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:01:15,505 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-25 18:01:15,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 109 [2021-11-25 18:01:15,607 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 18:01:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 18:01:15,709 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:01:15,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:01:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:01:15,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:01:15,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 109 [2021-11-25 18:01:15,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:01:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:15,841 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:01:15,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:01:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:15,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:15,922 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:01:15,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 168 [2021-11-25 18:01:15,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:15,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:15,964 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:01:15,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:01:15,985 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:01:16,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3009#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |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) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 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_main_#t~mem13#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_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:01:16,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:01:16,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:01:16,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-11-25 18:01:16,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056115006] [2021-11-25 18:01:16,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:01:16,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:01:16,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:16,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:01:16,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=557, Unknown=1, NotChecked=50, Total=756 [2021-11-25 18:01:16,362 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-11-25 18:01:19,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 18:01:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:19,629 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-11-25 18:01:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 18:01:19,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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 [2021-11-25 18:01:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:19,631 INFO L225 Difference]: With dead ends: 124 [2021-11-25 18:01:19,631 INFO L226 Difference]: Without dead ends: 122 [2021-11-25 18:01:19,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=255, Invalid=1154, Unknown=1, NotChecked=72, Total=1482 [2021-11-25 18:01:19,632 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:19,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 150 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 246 Invalid, 1 Unknown, 223 Unchecked, 2.9s Time] [2021-11-25 18:01:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-25 18:01:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 45. [2021-11-25 18:01:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:01:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2021-11-25 18:01:19,643 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 17 [2021-11-25 18:01:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:19,643 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2021-11-25 18:01:19,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-11-25 18:01:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2021-11-25 18:01:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:01:19,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:19,644 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:01:19,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:01:19,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:01:19,862 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -176283761, now seen corresponding path program 6 times [2021-11-25 18:01:19,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:19,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219594387] [2021-11-25 18:01:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:19,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:19,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:01:19,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781177549] [2021-11-25 18:01:19,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:01:19,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:01:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:01:19,890 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:01:19,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:01:19,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:01:19,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:01:19,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:01:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:01:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:01:20,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:01:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:01:20,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:20,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219594387] [2021-11-25 18:01:20,138 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:01:20,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781177549] [2021-11-25 18:01:20,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781177549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:01:20,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1655321684] [2021-11-25 18:01:20,139 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:01:20,140 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:01:20,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:01:20,140 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:01:20,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:01:20,238 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:01:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:01:20,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2021-11-25 18:01:20,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:01:20,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:20,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 25 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 156 [2021-11-25 18:01:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:20,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:20,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,512 INFO L354 Elim1Store]: treesize reduction 312, result has 0.3 percent of original size [2021-11-25 18:01:20,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 34 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 538 treesize of output 507 [2021-11-25 18:01:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:01:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:20,622 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:01:20,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:01:20,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:20,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:20,688 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:01:20,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2021-11-25 18:01:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:20,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:20,720 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:01:20,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:01:20,862 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:01:21,352 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3408#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |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___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:01:21,352 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:01:21,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:01:21,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-11-25 18:01:21,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094962500] [2021-11-25 18:01:21,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:01:21,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:01:21,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:01:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:01:21,354 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:01:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:21,978 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2021-11-25 18:01:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 18:01:21,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 18:01:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:21,979 INFO L225 Difference]: With dead ends: 104 [2021-11-25 18:01:21,980 INFO L226 Difference]: Without dead ends: 89 [2021-11-25 18:01:21,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=1499, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 18:01:21,981 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 87 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:21,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 154 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:01:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-25 18:01:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 38. [2021-11-25 18:01:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:01:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-11-25 18:01:21,991 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2021-11-25 18:01:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:21,991 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-11-25 18:01:21,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:01:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-11-25 18:01:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:01:21,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:21,993 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:01:22,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:01:22,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:01:22,198 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:22,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1499444630, now seen corresponding path program 7 times [2021-11-25 18:01:22,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:22,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956128219] [2021-11-25 18:01:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:22,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:22,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:01:22,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488287901] [2021-11-25 18:01:22,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:01:22,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:01:22,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:01:22,235 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:01:22,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 18:01:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-25 18:01:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:01:23,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:01:23,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:01:23,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 20 treesize of output 20 [2021-11-25 18:01:23,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:01:23,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:01:23,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 71 treesize of output 67 [2021-11-25 18:01:23,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 68 [2021-11-25 18:01:23,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2021-11-25 18:01:23,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 71 treesize of output 67 [2021-11-25 18:01:23,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 68 [2021-11-25 18:01:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2021-11-25 18:01:23,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 71 treesize of output 67 [2021-11-25 18:01:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 68 [2021-11-25 18:01:23,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 26 [2021-11-25 18:01:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:01:23,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 147 treesize of output 135 [2021-11-25 18:01:23,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:01:23,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 163 [2021-11-25 18:01:23,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:01:23,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 50 [2021-11-25 18:01:23,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 106 treesize of output 98 [2021-11-25 18:01:23,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 125 [2021-11-25 18:01:23,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:01:23,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 49 [2021-11-25 18:01:23,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 106 treesize of output 98 [2021-11-25 18:01:23,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:23,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 125 [2021-11-25 18:01:23,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:01:24,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:24,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:24,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:24,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 64 [2021-11-25 18:01:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:24,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:01:24,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 43 treesize of output 44 [2021-11-25 18:01:24,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-11-25 18:01:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:01:24,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:02,062 WARN L227 SmtUtils]: Spent 8.99s on a formula simplification. DAG size of input: 161 DAG size of output: 143 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:02:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:02,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:02,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956128219] [2021-11-25 18:02:02,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:02:02,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488287901] [2021-11-25 18:02:02,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488287901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:02:02,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034431255] [2021-11-25 18:02:02,080 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:02:02,081 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:02:02,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:02:02,081 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:02:02,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:02:02,173 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-25 18:02:02,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 109 [2021-11-25 18:02:02,264 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 18:02:02,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 18:02:02,392 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:02:02,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:02:02,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:02:02,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:02:02,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 109 [2021-11-25 18:02:02,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 18:02:02,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:02,504 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:02:02,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 27 [2021-11-25 18:02:02,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:02,637 INFO L354 Elim1Store]: treesize reduction 265, result has 11.4 percent of original size [2021-11-25 18:02:02,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 123 treesize of output 159 [2021-11-25 18:02:02,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:02,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:02,679 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:02:02,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 94 [2021-11-25 18:02:02,811 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:02:04,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3801#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#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___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:02:04,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:02:04,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:02:04,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-11-25 18:02:04,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869587738] [2021-11-25 18:02:04,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:02:04,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 18:02:04,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 18:02:04,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=855, Unknown=7, NotChecked=0, Total=992 [2021-11-25 18:02:04,308 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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) [2021-11-25 18:02:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:05,599 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2021-11-25 18:02:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:02:05,600 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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 18 [2021-11-25 18:02:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:05,601 INFO L225 Difference]: With dead ends: 62 [2021-11-25 18:02:05,601 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 18:02:05,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=178, Invalid=1075, Unknown=7, NotChecked=0, Total=1260 [2021-11-25 18:02:05,602 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:05,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2021-11-25 18:02:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 18:02:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-11-25 18:02:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 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) [2021-11-25 18:02:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-11-25 18:02:05,610 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 18 [2021-11-25 18:02:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:05,610 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-11-25 18:02:05,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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) [2021-11-25 18:02:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2021-11-25 18:02:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:02:05,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:05,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:05,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:02:05,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:02:05,813 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:05,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1481457124, now seen corresponding path program 8 times [2021-11-25 18:02:05,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:05,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362614383] [2021-11-25 18:02:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:05,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:05,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:02:05,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721485211] [2021-11-25 18:02:05,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:02:05,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:05,836 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:05,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ddd66ce-9fc4-401c-898b-653c2c06cf0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 18:02:06,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:02:06,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:02:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-25 18:02:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:06,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:02:06,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:02:06,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 20 treesize of output 20 [2021-11-25 18:02:06,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:02:06,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 7 [2021-11-25 18:02:06,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-11-25 18:02:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 43 treesize of output 44 [2021-11-25 18:02:06,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 88 treesize of output 80 [2021-11-25 18:02:06,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 87 [2021-11-25 18:02:06,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:02:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-11-25 18:02:06,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 159 treesize of output 145 [2021-11-25 18:02:06,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:02:06,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:06,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 166 [2021-11-25 18:02:07,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:02:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 68 [2021-11-25 18:02:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2021-11-25 18:02:07,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 115 treesize of output 99 [2021-11-25 18:02:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,252 INFO L354 Elim1Store]: treesize reduction 72, result has 41.0 percent of original size [2021-11-25 18:02:07,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 141 [2021-11-25 18:02:07,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2021-11-25 18:02:07,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:07,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 96 [2021-11-25 18:02:08,696 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-25 18:02:08,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 44 [2021-11-25 18:02:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:08,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:48,302 WARN L227 SmtUtils]: Spent 9.51s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)