./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de31.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_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/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_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de31.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/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_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/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 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:54:10,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:54:10,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:54:11,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:54:11,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:54:11,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:54:11,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:54:11,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:54:11,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:54:11,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:54:11,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:54:11,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:54:11,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:54:11,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:54:11,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:54:11,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:54:11,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:54:11,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:54:11,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:54:11,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:54:11,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:54:11,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:54:11,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:54:11,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:54:11,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:54:11,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:54:11,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:54:11,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:54:11,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:54:11,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:54:11,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:54:11,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:54:11,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:54:11,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:54:11,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:54:11,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:54:11,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:54:11,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:54:11,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:54:11,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:54:11,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:54:11,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:54:11,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:54:11,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:54:11,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:54:11,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:54:11,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:54:11,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:54:11,130 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:54:11,130 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:54:11,130 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:54:11,130 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:54:11,131 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:54:11,131 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:54:11,131 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:54:11,131 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:54:11,131 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:54:11,132 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:54:11,132 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:54:11,132 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:54:11,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:54:11,141 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:54:11,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:54:11,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:54:11,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:54:11,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:54:11,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:54:11,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:54:11,143 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:54:11,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:54:11,143 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:54:11,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:54:11,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:54:11,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:54:11,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:54:11,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:54:11,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:54:11,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:54:11,145 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:54:11,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:54:11,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:54:11,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:54:11,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:54:11,146 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_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 [2021-11-25 19:54:11,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:54:11,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:54:11,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:54:11,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:54:11,406 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:54:11,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loops-crafted-1/in-de31.c [2021-11-25 19:54:11,475 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/data/e90142efb/147593bcc3a442b99de89172032ac306/FLAGb5be870eb [2021-11-25 19:54:11,861 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:54:11,861 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/sv-benchmarks/c/loops-crafted-1/in-de31.c [2021-11-25 19:54:11,872 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/data/e90142efb/147593bcc3a442b99de89172032ac306/FLAGb5be870eb [2021-11-25 19:54:12,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/data/e90142efb/147593bcc3a442b99de89172032ac306 [2021-11-25 19:54:12,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:54:12,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:54:12,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:54:12,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:54:12,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:54:12,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed189b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12, skipping insertion in model container [2021-11-25 19:54:12,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:54:12,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:54:12,478 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_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2021-11-25 19:54:12,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:54:12,519 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:54:12,534 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_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2021-11-25 19:54:12,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:54:12,553 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:54:12,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12 WrapperNode [2021-11-25 19:54:12,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:54:12,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:54:12,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:54:12,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:54:12,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,592 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2021-11-25 19:54:12,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:54:12,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:54:12,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:54:12,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:54:12,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:54:12,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:54:12,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:54:12,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:54:12,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (1/1) ... [2021-11-25 19:54:12,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:54:12,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:12,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:54:12,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:54:12,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:54:12,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:54:12,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:54:12,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:54:12,772 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:54:12,774 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:54:12,876 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:54:12,903 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:54:12,903 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:54:12,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:54:12 BoogieIcfgContainer [2021-11-25 19:54:12,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:54:12,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:54:12,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:54:12,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:54:12,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:54:12" (1/3) ... [2021-11-25 19:54:12,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665980ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:54:12, skipping insertion in model container [2021-11-25 19:54:12,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:12" (2/3) ... [2021-11-25 19:54:12,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665980ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:54:12, skipping insertion in model container [2021-11-25 19:54:12,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:54:12" (3/3) ... [2021-11-25 19:54:12,913 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de31.c [2021-11-25 19:54:12,917 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:54:12,917 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:54:12,960 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:54:12,967 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 19:54:12,968 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:54:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:54:12,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:12,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:54:12,986 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:12,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1774769397, now seen corresponding path program 1 times [2021-11-25 19:54:13,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:13,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135141525] [2021-11-25 19:54:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:13,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:13,310 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 19:54:13,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:13,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135141525] [2021-11-25 19:54:13,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135141525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:13,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:13,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:54:13,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392005760] [2021-11-25 19:54:13,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:13,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:54:13,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:13,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:54:13,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:54:13,347 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:13,438 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2021-11-25 19:54:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:54:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:54:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:13,448 INFO L225 Difference]: With dead ends: 22 [2021-11-25 19:54:13,448 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 19:54:13,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:54:13,454 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:13,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 13 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:54:13,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 19:54:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 19:54:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 19:54:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-11-25 19:54:13,486 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 6 [2021-11-25 19:54:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:13,486 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-11-25 19:54:13,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2021-11-25 19:54:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:54:13,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:13,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:13,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:54:13,489 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash -611083188, now seen corresponding path program 1 times [2021-11-25 19:54:13,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:13,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986719011] [2021-11-25 19:54:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:13,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:13,607 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 19:54:13,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:13,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986719011] [2021-11-25 19:54:13,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986719011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:13,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128364946] [2021-11-25 19:54:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:13,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:13,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:13,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:13,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:54:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:13,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:54:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:13,809 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 19:54:13,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:13,851 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 19:54:13,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128364946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:13,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1669921481] [2021-11-25 19:54:13,870 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:54:13,870 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:13,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:13,879 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:13,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:14,002 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:14,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '107#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:54:14,198 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:14,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:14,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-25 19:54:14,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924376761] [2021-11-25 19:54:14,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:14,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:54:14,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:14,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:54:14,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:54:14,202 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) 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 19:54:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:14,334 INFO L93 Difference]: Finished difference Result 29 states and 44 transitions. [2021-11-25 19:54:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:54:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) 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 7 [2021-11-25 19:54:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:14,336 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:54:14,336 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 19:54:14,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:54:14,339 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:14,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:54:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 19:54:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-11-25 19:54:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 19:54:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2021-11-25 19:54:14,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 7 [2021-11-25 19:54:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:14,346 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2021-11-25 19:54:14,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) 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 19:54:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2021-11-25 19:54:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:54:14,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:14,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:14,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:14,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 19:54:14,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash 212774083, now seen corresponding path program 1 times [2021-11-25 19:54:14,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:14,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299753431] [2021-11-25 19:54:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:14,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:14,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:14,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299753431] [2021-11-25 19:54:14,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299753431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:14,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668571509] [2021-11-25 19:54:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:14,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:14,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:14,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:14,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:54:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:15,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 19:54:15,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:15,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:15,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668571509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:15,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304864086] [2021-11-25 19:54:15,537 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:54:15,537 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:15,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:15,537 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:15,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:15,678 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:15,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '253#(and (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:54:15,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:15,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:15,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2021-11-25 19:54:15,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818690456] [2021-11-25 19:54:15,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:15,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:54:15,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:15,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:54:15,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:54:15,818 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:17,245 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-11-25 19:54:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 19:54:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:54:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:17,247 INFO L225 Difference]: With dead ends: 39 [2021-11-25 19:54:17,247 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:54:17,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:54:17,250 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:17,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 18 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:54:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:54:17,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2021-11-25 19:54:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-11-25 19:54:17,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2021-11-25 19:54:17,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:17,262 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-11-25 19:54:17,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-11-25 19:54:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:54:17,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:17,264 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:17,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:17,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:17,484 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1114239819, now seen corresponding path program 2 times [2021-11-25 19:54:17,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:17,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531991684] [2021-11-25 19:54:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:17,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:17,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:17,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531991684] [2021-11-25 19:54:17,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531991684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:17,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685634017] [2021-11-25 19:54:17,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:54:17,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:17,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:17,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:17,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:54:17,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:54:17,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:17,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:54:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:17,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:17,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685634017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:17,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [5289783] [2021-11-25 19:54:17,799 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:54:17,799 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:17,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:17,802 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:17,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:17,875 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:18,068 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '426#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:54:18,069 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:18,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:18,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-25 19:54:18,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354981493] [2021-11-25 19:54:18,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:18,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:54:18,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:54:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:54:18,071 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) 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 19:54:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:18,837 INFO L93 Difference]: Finished difference Result 62 states and 102 transitions. [2021-11-25 19:54:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:54:18,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) 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 10 [2021-11-25 19:54:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:18,839 INFO L225 Difference]: With dead ends: 62 [2021-11-25 19:54:18,839 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 19:54:18,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=321, Invalid=939, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:54:18,842 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 76 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:18,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 17 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:54:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 19:54:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 32. [2021-11-25 19:54:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:54:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2021-11-25 19:54:18,852 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 10 [2021-11-25 19:54:18,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:18,852 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2021-11-25 19:54:18,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) 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 19:54:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2021-11-25 19:54:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:54:18,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:18,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:18,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:19,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:19,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash -60019915, now seen corresponding path program 2 times [2021-11-25 19:54:19,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:19,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278173415] [2021-11-25 19:54:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:19,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:54:19,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:19,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278173415] [2021-11-25 19:54:19,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278173415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:19,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950433396] [2021-11-25 19:54:19,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:54:19,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:19,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:19,142 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:19,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:54:19,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:54:19,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:19,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:54:19,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:54:19,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:54:19,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950433396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:19,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458113103] [2021-11-25 19:54:19,377 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:54:19,378 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:19,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:19,378 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:19,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:19,498 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:19,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '682#(and (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:54:19,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:19,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:19,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-11-25 19:54:19,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510309544] [2021-11-25 19:54:19,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:19,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:54:19,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:54:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:54:19,589 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:19,761 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2021-11-25 19:54:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:54:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 19:54:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:19,763 INFO L225 Difference]: With dead ends: 62 [2021-11-25 19:54:19,764 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 19:54:19,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:54:19,765 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:19,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:54:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 19:54:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2021-11-25 19:54:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 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 19:54:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 57 transitions. [2021-11-25 19:54:19,777 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 57 transitions. Word has length 11 [2021-11-25 19:54:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:19,777 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 57 transitions. [2021-11-25 19:54:19,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 57 transitions. [2021-11-25 19:54:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:54:19,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:19,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:19,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 19:54:20,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:20,001 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:20,001 INFO L85 PathProgramCache]: Analyzing trace with hash -454325109, now seen corresponding path program 3 times [2021-11-25 19:54:20,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:20,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841951113] [2021-11-25 19:54:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:20,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:20,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:20,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841951113] [2021-11-25 19:54:20,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841951113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:20,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39869327] [2021-11-25 19:54:20,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:54:20,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:20,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:20,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:20,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:54:20,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:54:20,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:20,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 19:54:20,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:20,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:21,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39869327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:21,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282322962] [2021-11-25 19:54:21,090 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:54:21,091 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:21,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:21,091 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:21,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:21,189 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:21,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '937#(and (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:54:21,335 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:21,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:21,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2021-11-25 19:54:21,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341482649] [2021-11-25 19:54:21,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:21,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:54:21,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:21,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:54:21,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:54:21,337 INFO L87 Difference]: Start difference. First operand 39 states and 57 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:22,877 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2021-11-25 19:54:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 19:54:22,877 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 19:54:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:22,878 INFO L225 Difference]: With dead ends: 79 [2021-11-25 19:54:22,878 INFO L226 Difference]: Without dead ends: 61 [2021-11-25 19:54:22,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:54:22,880 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:22,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 56 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:54:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-25 19:54:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2021-11-25 19:54:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 0 states have call successors, (0), 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 19:54:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2021-11-25 19:54:22,900 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 12 [2021-11-25 19:54:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:22,900 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2021-11-25 19:54:22,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:54:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2021-11-25 19:54:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:54:22,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:22,904 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:22,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:23,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:54:23,128 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash -161296350, now seen corresponding path program 4 times [2021-11-25 19:54:23,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:23,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285195670] [2021-11-25 19:54:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:23,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:54:23,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:23,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285195670] [2021-11-25 19:54:23,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285195670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:23,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737572755] [2021-11-25 19:54:23,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:54:23,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:23,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:23,248 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:23,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:54:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:23,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:54:23,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:54:23,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:54:23,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737572755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426643890] [2021-11-25 19:54:23,562 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:54:23,562 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:23,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:23,563 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:23,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:23,669 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:23,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1243#(and (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:54:23,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:23,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:23,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-11-25 19:54:23,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945456433] [2021-11-25 19:54:23,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:23,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 19:54:23,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:23,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 19:54:23,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:54:23,783 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) 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 19:54:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:29,192 INFO L93 Difference]: Finished difference Result 107 states and 167 transitions. [2021-11-25 19:54:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-25 19:54:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) 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) Word has length 14 [2021-11-25 19:54:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:29,194 INFO L225 Difference]: With dead ends: 107 [2021-11-25 19:54:29,194 INFO L226 Difference]: Without dead ends: 98 [2021-11-25 19:54:29,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1452, Invalid=4400, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 19:54:29,198 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 162 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:29,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 39 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:54:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-25 19:54:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 54. [2021-11-25 19:54:29,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 53 states have internal predecessors, (77), 0 states have call successors, (0), 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 19:54:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2021-11-25 19:54:29,213 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 14 [2021-11-25 19:54:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:29,213 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2021-11-25 19:54:29,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) 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 19:54:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2021-11-25 19:54:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:54:29,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:29,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:29,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:29,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:29,440 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:29,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1197854901, now seen corresponding path program 5 times [2021-11-25 19:54:29,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:29,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816801249] [2021-11-25 19:54:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:29,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:54:29,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:29,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816801249] [2021-11-25 19:54:29,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816801249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:29,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368360773] [2021-11-25 19:54:29,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:54:29,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:29,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:29,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:29,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:54:29,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:54:29,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 19:54:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:54:29,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:54:29,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368360773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:29,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033317852] [2021-11-25 19:54:29,801 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:54:29,801 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:29,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:29,802 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:29,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:29,896 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:30,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1701#(and (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:54:30,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:30,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:30,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-11-25 19:54:30,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958013363] [2021-11-25 19:54:30,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:30,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 19:54:30,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:30,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 19:54:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:54:30,009 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand has 18 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 19:54:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:30,305 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-11-25 19:54:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 19:54:30,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 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) Word has length 14 [2021-11-25 19:54:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:30,307 INFO L225 Difference]: With dead ends: 93 [2021-11-25 19:54:30,307 INFO L226 Difference]: Without dead ends: 82 [2021-11-25 19:54:30,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:54:30,309 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:30,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 32 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:54:30,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-25 19:54:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2021-11-25 19:54:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 0 states have call successors, (0), 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 19:54:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-11-25 19:54:30,325 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 14 [2021-11-25 19:54:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:30,325 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-11-25 19:54:30,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 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 19:54:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-11-25 19:54:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:54:30,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:30,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:30,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:30,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:54:30,549 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:30,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2107416637, now seen corresponding path program 6 times [2021-11-25 19:54:30,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:30,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114392624] [2021-11-25 19:54:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:30,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:30,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:30,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114392624] [2021-11-25 19:54:30,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114392624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:30,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830556697] [2021-11-25 19:54:30,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:54:30,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:30,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:30,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:30,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5bc9d90-b92d-4696-93ac-f6d4b4f81c59/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:54:31,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:54:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-25 19:54:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:26,796 WARN L227 SmtUtils]: Spent 1.85m on a formula simplification. DAG size of input: 17402 DAG size of output: 16802 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)