./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested5-2.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_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/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_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/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_8db4e3e3-0697-44a6-8378-41815ec4a954/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 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:19:23,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:19:23,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:19:24,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:19:24,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:19:24,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:19:24,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:19:24,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:19:24,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:19:24,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:19:24,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:19:24,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:19:24,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:19:24,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:19:24,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:19:24,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:19:24,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:19:24,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:19:24,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:19:24,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:19:24,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:19:24,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:19:24,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:19:24,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:19:24,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:19:24,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:19:24,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:19:24,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:19:24,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:19:24,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:19:24,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:19:24,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:19:24,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:19:24,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:19:24,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:19:24,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:19:24,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:19:24,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:19:24,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:19:24,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:19:24,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:19:24,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:19:24,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:19:24,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:19:24,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:19:24,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:19:24,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:19:24,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:19:24,164 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:19:24,165 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:19:24,165 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:19:24,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:19:24,166 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:19:24,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:19:24,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:19:24,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:19:24,167 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:19:24,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:19:24,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:19:24,168 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:19:24,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:19:24,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:19:24,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:19:24,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:19:24,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:19:24,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:19:24,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:19:24,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:19:24,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:19:24,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:19:24,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:19:24,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:19:24,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:19:24,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:19:24,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:19:24,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:19:24,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:19:24,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:19:24,172 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:19:24,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:19:24,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:19:24,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:19:24,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:19:24,173 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_8db4e3e3-0697-44a6-8378-41815ec4a954/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 [2021-11-25 18:19:24,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:19:24,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:19:24,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:19:24,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:19:24,462 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:19:24,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loops-crafted-1/nested5-2.c [2021-11-25 18:19:24,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/data/a3777cef3/5588e0c5aea64848a09005e073966eef/FLAGe5c39ad5e [2021-11-25 18:19:24,985 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:19:24,985 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/sv-benchmarks/c/loops-crafted-1/nested5-2.c [2021-11-25 18:19:24,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/data/a3777cef3/5588e0c5aea64848a09005e073966eef/FLAGe5c39ad5e [2021-11-25 18:19:25,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/data/a3777cef3/5588e0c5aea64848a09005e073966eef [2021-11-25 18:19:25,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:19:25,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:19:25,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:19:25,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:19:25,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:19:25,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ee56a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25, skipping insertion in model container [2021-11-25 18:19:25,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:19:25,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:19:25,588 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_8db4e3e3-0697-44a6-8378-41815ec4a954/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] [2021-11-25 18:19:25,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:19:25,622 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:19:25,642 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_8db4e3e3-0697-44a6-8378-41815ec4a954/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] [2021-11-25 18:19:25,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:19:25,675 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:19:25,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25 WrapperNode [2021-11-25 18:19:25,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:19:25,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:19:25,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:19:25,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:19:25,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,721 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-25 18:19:25,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:19:25,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:19:25,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:19:25,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:19:25,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:19:25,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:19:25,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:19:25,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:19:25,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (1/1) ... [2021-11-25 18:19:25,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:19:25,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:25,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:19:25,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:19:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:19:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:19:25,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:19:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:19:25,933 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:19:25,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:19:26,063 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:19:26,092 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:19:26,092 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 18:19:26,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:26 BoogieIcfgContainer [2021-11-25 18:19:26,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:19:26,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:19:26,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:19:26,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:19:26,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:19:25" (1/3) ... [2021-11-25 18:19:26,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28912583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:19:26, skipping insertion in model container [2021-11-25 18:19:26,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:25" (2/3) ... [2021-11-25 18:19:26,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28912583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:19:26, skipping insertion in model container [2021-11-25 18:19:26,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:26" (3/3) ... [2021-11-25 18:19:26,102 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2021-11-25 18:19:26,107 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:19:26,108 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:19:26,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:19:26,169 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 18:19:26,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:19:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:19:26,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:26,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:26,189 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash -614732004, now seen corresponding path program 1 times [2021-11-25 18:19:26,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:19:26,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573875988] [2021-11-25 18:19:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:26,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:19:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:26,380 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 18:19:26,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:19:26,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573875988] [2021-11-25 18:19:26,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573875988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:19:26,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:19:26,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:19:26,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361883996] [2021-11-25 18:19:26,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:19:26,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:19:26,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:19:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:19:26,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:19:26,420 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:19:26,465 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2021-11-25 18:19:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:19:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 18:19:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:19:26,475 INFO L225 Difference]: With dead ends: 27 [2021-11-25 18:19:26,475 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 18:19:26,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:19:26,482 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:19:26,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:19:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 18:19:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2021-11-25 18:19:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-11-25 18:19:26,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2021-11-25 18:19:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:19:26,538 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-11-25 18:19:26,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-11-25 18:19:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:19:26,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:26,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:26,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:19:26,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:26,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1877140079, now seen corresponding path program 1 times [2021-11-25 18:19:26,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:19:26,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063449024] [2021-11-25 18:19:26,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:26,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:19:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:26,651 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 18:19:26,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:19:26,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063449024] [2021-11-25 18:19:26,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063449024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:19:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413514535] [2021-11-25 18:19:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:26,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:26,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:26,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:19:26,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:19:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:26,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:19:26,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:19:26,761 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 18:19:26,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:19:26,798 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 18:19:26,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413514535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:19:26,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060731840] [2021-11-25 18:19:26,844 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:19:26,845 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:19:26,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:19:26,855 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:19:26,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:19:27,215 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:19:27,456 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '134#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~w~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) (<= 268435455 (mod |ULTIMATE.start_main_~v~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~v~0#1| 4) 0) 1 0)) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:19:27,456 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:19:27,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:19:27,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-25 18:19:27,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361941379] [2021-11-25 18:19:27,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:19:27,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:19:27,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:19:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:19:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:19:27,460 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:19:27,561 INFO L93 Difference]: Finished difference Result 28 states and 42 transitions. [2021-11-25 18:19:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:19:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:19:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:19:27,562 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:19:27,563 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 18:19:27,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:19:27,565 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:19:27,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:19:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 18:19:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-11-25 18:19:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-11-25 18:19:27,570 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2021-11-25 18:19:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:19:27,571 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-11-25 18:19:27,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-11-25 18:19:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:19:27,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:27,572 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:27,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:19:27,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:27,773 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:27,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:27,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1720818596, now seen corresponding path program 2 times [2021-11-25 18:19:27,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:19:27,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735425233] [2021-11-25 18:19:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:27,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:19:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:27,920 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 18:19:27,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:19:27,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735425233] [2021-11-25 18:19:27,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735425233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:19:27,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497447609] [2021-11-25 18:19:27,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:19:27,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:27,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:27,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:19:27,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:19:27,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:19:27,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:19:27,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:19:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:19:28,067 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 18:19:28,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:19:28,179 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 18:19:28,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497447609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:19:28,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662173122] [2021-11-25 18:19:28,183 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:19:28,183 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:19:28,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:19:28,184 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:19:28,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:19:28,431 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:19:28,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '292#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~w~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) (<= 268435455 (mod |ULTIMATE.start_main_~v~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~v~0#1| 4) 0) 1 0)) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:19:28,662 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:19:28,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:19:28,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-25 18:19:28,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030151551] [2021-11-25 18:19:28,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:19:28,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:19:28,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:19:28,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:19:28,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:19:28,665 INFO L87 Difference]: Start difference. First operand 14 states and 18 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 18:19:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:19:29,137 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2021-11-25 18:19:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:19:29,139 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 12 [2021-11-25 18:19:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:19:29,140 INFO L225 Difference]: With dead ends: 37 [2021-11-25 18:19:29,140 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 18:19:29,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:19:29,142 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:19:29,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 49 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:19:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 18:19:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-11-25 18:19:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-25 18:19:29,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2021-11-25 18:19:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:19:29,149 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-25 18:19:29,149 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 18:19:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-25 18:19:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:19:29,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:29,150 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:29,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:19:29,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:29,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash -771659716, now seen corresponding path program 3 times [2021-11-25 18:19:29,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:19:29,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441203087] [2021-11-25 18:19:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:29,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:19:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:19:29,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:19:29,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441203087] [2021-11-25 18:19:29,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441203087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:19:29,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831026773] [2021-11-25 18:19:29,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:19:29,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:29,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:29,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:19:29,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:19:29,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:19:29,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:19:29,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:19:29,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:19:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:19:29,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:19:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:19:30,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831026773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:19:30,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1441244090] [2021-11-25 18:19:30,074 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:19:30,075 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:19:30,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:19:30,075 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:19:30,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:19:30,219 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:19:30,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '534#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~w~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) (<= 268435455 (mod |ULTIMATE.start_main_~v~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~v~0#1| 4) 0) 1 0)) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:19:30,572 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:19:30,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:19:30,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-25 18:19:30,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767277055] [2021-11-25 18:19:30,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:19:30,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 18:19:30,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:19:30,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 18:19:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:19:30,575 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 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 18:19:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:19:35,928 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2021-11-25 18:19:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:19:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 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 18 [2021-11-25 18:19:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:19:35,929 INFO L225 Difference]: With dead ends: 55 [2021-11-25 18:19:35,930 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 18:19:35,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:19:35,932 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:19:35,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 103 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:19:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 18:19:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-11-25 18:19:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-25 18:19:35,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2021-11-25 18:19:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:19:35,939 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-25 18:19:35,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 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 18:19:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-25 18:19:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:19:35,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:35,940 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:35,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:19:36,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-25 18:19:36,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:36,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1011234812, now seen corresponding path program 4 times [2021-11-25 18:19:36,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:19:36,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589398268] [2021-11-25 18:19:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:36,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:19:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:19:36,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:19:36,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589398268] [2021-11-25 18:19:36,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589398268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:19:36,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055284131] [2021-11-25 18:19:36,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:19:36,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:36,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:36,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:19:36,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:19:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-25 18:19:36,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:19:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:19:36,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:19:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:19:38,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055284131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:19:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821987702] [2021-11-25 18:19:38,157 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:19:38,157 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:19:38,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:19:38,157 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:19:38,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:19:38,264 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:19:38,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '944#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~w~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) (<= 268435455 (mod |ULTIMATE.start_main_~v~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~v~0#1| 4) 0) 1 0)) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:19:38,741 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:19:38,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:19:38,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-25 18:19:38,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30822588] [2021-11-25 18:19:38,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:19:38,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-25 18:19:38,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:19:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-25 18:19:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=2049, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 18:19:38,746 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 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 18:21:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:51,431 INFO L93 Difference]: Finished difference Result 91 states and 126 transitions. [2021-11-25 18:21:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:21:51,432 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 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) Word has length 30 [2021-11-25 18:21:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:51,434 INFO L225 Difference]: With dead ends: 91 [2021-11-25 18:21:51,434 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 18:21:51,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 134.1s TimeCoverageRelationStatistics Valid=1803, Invalid=3743, Unknown=4, NotChecked=0, Total=5550 [2021-11-25 18:21:51,439 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:51,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 217 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:21:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 18:21:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-11-25 18:21:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:21:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-25 18:21:51,448 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 30 [2021-11-25 18:21:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:51,449 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-25 18:21:51,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 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 18:21:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-25 18:21:51,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 18:21:51,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:51,451 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:21:51,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:51,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:51,656 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1171453820, now seen corresponding path program 5 times [2021-11-25 18:21:51,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:21:51,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908837998] [2021-11-25 18:21:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:51,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:21:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:53,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:21:53,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908837998] [2021-11-25 18:21:53,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908837998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:21:53,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728049562] [2021-11-25 18:21:53,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:21:53,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:53,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:53,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:21:53,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8db4e3e3-0697-44a6-8378-41815ec4a954/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:21:53,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-25 18:21:53,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:21:53,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-25 18:21:53,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:54,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:01,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728049562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:01,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1418328230] [2021-11-25 18:22:01,041 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:22:01,042 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:01,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:01,042 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:01,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:01,124 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:01,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1691#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~w~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) (<= 268435455 (mod |ULTIMATE.start_main_~v~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~v~0#1| 4) 0) 1 0)) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:01,912 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:01,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:01,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 50] total 98 [2021-11-25 18:22:01,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677323977] [2021-11-25 18:22:01,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:01,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-25 18:22:01,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-25 18:22:01,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2557, Invalid=7745, Unknown=0, NotChecked=0, Total=10302 [2021-11-25 18:22:01,920 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 98 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 98 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:22:05,021 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (+ 2 |c_ULTIMATE.start_main_~v~0#1|)) (.cse6 (+ |c_ULTIMATE.start_main_~v~0#1| 1)) (.cse5 (+ 3 |c_ULTIMATE.start_main_~v~0#1|))) (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~v~0#1| 4) 0)) (.cse0 (= (mod .cse5 4) 0)) (.cse2 (= (mod .cse6 4) 0)) (.cse3 (= (mod .cse4 4) 0))) (and (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 11) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 20) 4294967296) 268435455)) (or (< (mod (+ 21 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 13) 4294967296) 268435455)) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 39) 4294967296) 268435455)) (or .cse0 (< (mod (+ 31 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 25) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 27) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 8) 4294967296) 268435455)) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 45) 4294967296) 268435455)) (or .cse1 (< (mod (+ 44 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 22 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 6 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 16 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 43) 4294967296) 268435455) .cse0) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 38) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 28) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 10) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 26) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 17) 4294967296) 268435455) .cse2) (or (< (mod .cse4 4294967296) 268435455) .cse3) (or .cse3 (< (mod (+ 42 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 15) 4294967296) 268435455)) (or .cse2 (< (mod (+ 9 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 4) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 33) 4294967296) 268435455) .cse2) (or (< (mod .cse5 4294967296) 268435455) .cse0) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 18) 4294967296) 268435455) .cse3) (or .cse1 (< (mod (+ 32 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 34) 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ 23 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 40 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod .cse6 4294967296) 268435455) .cse2) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 24) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 12) 4294967296) 268435455)) (or .cse0 (< (mod (+ 7 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 36) 4294967296) 268435455)) (or (< (mod (+ 30 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse3) (or .cse2 (< (mod (+ 29 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ 19 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod |c_ULTIMATE.start_main_~v~0#1| 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 37) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ 35 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 41 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse3 (< (mod (+ 14 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 5 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse3 (< (mod (+ 46 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455))))) is different from false [2021-11-25 18:22:07,038 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (+ |c_ULTIMATE.start_main_~v~0#1| 1)) (.cse4 (+ 2 |c_ULTIMATE.start_main_~v~0#1|)) (.cse5 (+ 3 |c_ULTIMATE.start_main_~v~0#1|))) (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~v~0#1| 4) 0)) (.cse0 (= (mod .cse5 4) 0)) (.cse3 (= (mod .cse4 4) 0)) (.cse2 (= (mod .cse6 4) 0))) (and (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 11) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 20) 4294967296) 268435455)) (or (< (mod (+ 21 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 13) 4294967296) 268435455)) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 39) 4294967296) 268435455)) (or .cse0 (< (mod (+ 31 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 25) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 27) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 8) 4294967296) 268435455)) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 45) 4294967296) 268435455)) (or .cse1 (< (mod (+ 44 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 22 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 6 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 16 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 43) 4294967296) 268435455) .cse0) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 38) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 28) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 10) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 26) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 17) 4294967296) 268435455) .cse2) (or (< (mod .cse4 4294967296) 268435455) .cse3) (or .cse3 (< (mod (+ 42 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 15) 4294967296) 268435455)) (or .cse2 (< (mod (+ 9 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 4) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 33) 4294967296) 268435455) .cse2) (or (< (mod .cse5 4294967296) 268435455) .cse0) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 18) 4294967296) 268435455) .cse3) (or .cse1 (< (mod (+ 32 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 34) 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ 23 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 40 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod .cse6 4294967296) 268435455) .cse2) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 24) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 12) 4294967296) 268435455)) (or .cse0 (< (mod (+ 7 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 36) 4294967296) 268435455)) (or (< (mod (+ 30 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse3) (or .cse2 (< (mod (+ 29 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ 19 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod |c_ULTIMATE.start_main_~v~0#1| 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 37) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ 35 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 41 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse3 (< (mod (+ 14 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 5 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2)))) is different from false [2021-11-25 18:22:09,055 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (+ |c_ULTIMATE.start_main_~v~0#1| 1)) (.cse4 (+ 2 |c_ULTIMATE.start_main_~v~0#1|)) (.cse5 (+ 3 |c_ULTIMATE.start_main_~v~0#1|))) (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~v~0#1| 4) 0)) (.cse0 (= (mod .cse5 4) 0)) (.cse3 (= (mod .cse4 4) 0)) (.cse2 (= (mod .cse6 4) 0))) (and (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 11) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 20) 4294967296) 268435455)) (or (< (mod (+ 21 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 13) 4294967296) 268435455)) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 39) 4294967296) 268435455)) (or .cse0 (< (mod (+ 31 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 25) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 27) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 8) 4294967296) 268435455)) (or .cse1 (< (mod (+ 44 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 22 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 6 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 16 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 43) 4294967296) 268435455) .cse0) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 38) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 28) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 10) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 26) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 17) 4294967296) 268435455) .cse2) (or (< (mod .cse4 4294967296) 268435455) .cse3) (or .cse3 (< (mod (+ 42 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 15) 4294967296) 268435455)) (or .cse2 (< (mod (+ 9 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 4) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 33) 4294967296) 268435455) .cse2) (or (< (mod .cse5 4294967296) 268435455) .cse0) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 18) 4294967296) 268435455) .cse3) (or .cse1 (< (mod (+ 32 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 34) 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ 23 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 40 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod .cse6 4294967296) 268435455) .cse2) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 24) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 12) 4294967296) 268435455)) (or .cse0 (< (mod (+ 7 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 36) 4294967296) 268435455)) (or (< (mod (+ 30 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse3) (or .cse2 (< (mod (+ 29 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ 19 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod |c_ULTIMATE.start_main_~v~0#1| 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 37) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ 35 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 41 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse3 (< (mod (+ 14 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 5 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2)))) is different from false [2021-11-25 18:22:11,110 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (+ |c_ULTIMATE.start_main_~v~0#1| 1)) (.cse4 (+ 2 |c_ULTIMATE.start_main_~v~0#1|)) (.cse5 (+ 3 |c_ULTIMATE.start_main_~v~0#1|))) (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~v~0#1| 4) 0)) (.cse0 (= (mod .cse5 4) 0)) (.cse3 (= (mod .cse4 4) 0)) (.cse2 (= (mod .cse6 4) 0))) (and (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 11) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 20) 4294967296) 268435455)) (or (< (mod (+ 21 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 13) 4294967296) 268435455)) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 39) 4294967296) 268435455)) (or .cse0 (< (mod (+ 31 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 25) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 27) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 8) 4294967296) 268435455)) (or .cse3 (< (mod (+ 22 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 6 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 16 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 43) 4294967296) 268435455) .cse0) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 38) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 28) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 10) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 26) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 17) 4294967296) 268435455) .cse2) (or (< (mod .cse4 4294967296) 268435455) .cse3) (or .cse3 (< (mod (+ 42 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 15) 4294967296) 268435455)) (or .cse2 (< (mod (+ 9 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 4) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 33) 4294967296) 268435455) .cse2) (or (< (mod .cse5 4294967296) 268435455) .cse0) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 18) 4294967296) 268435455) .cse3) (or .cse1 (< (mod (+ 32 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 34) 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ 23 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 40 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod .cse6 4294967296) 268435455) .cse2) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 24) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 12) 4294967296) 268435455)) (or .cse0 (< (mod (+ 7 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 36) 4294967296) 268435455)) (or (< (mod (+ 30 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse3) (or .cse2 (< (mod (+ 29 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ 19 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod |c_ULTIMATE.start_main_~v~0#1| 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 37) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ 35 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 41 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse3 (< (mod (+ 14 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 5 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2)))) is different from false [2021-11-25 18:24:40,881 WARN L227 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 226 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:27:00,375 WARN L227 SmtUtils]: Spent 1.10m on a formula simplification. DAG size of input: 221 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:24,269 WARN L227 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 216 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:26,394 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (+ |c_ULTIMATE.start_main_~v~0#1| 1)) (.cse4 (+ 2 |c_ULTIMATE.start_main_~v~0#1|)) (.cse5 (+ 3 |c_ULTIMATE.start_main_~v~0#1|))) (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~v~0#1| 4) 0)) (.cse0 (= (mod .cse5 4) 0)) (.cse3 (= (mod .cse4 4) 0)) (.cse2 (= (mod .cse6 4) 0))) (and (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 11) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 20) 4294967296) 268435455)) (or (< (mod (+ 21 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 13) 4294967296) 268435455)) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 39) 4294967296) 268435455)) (or .cse0 (< (mod (+ 31 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 25) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 27) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 8) 4294967296) 268435455)) (or .cse3 (< (mod (+ 22 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 6 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 16 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 38) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 28) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 10) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 26) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 17) 4294967296) 268435455) .cse2) (or (< (mod .cse4 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 15) 4294967296) 268435455)) (or .cse2 (< (mod (+ 9 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 4) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 33) 4294967296) 268435455) .cse2) (or (< (mod .cse5 4294967296) 268435455) .cse0) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 18) 4294967296) 268435455) .cse3) (or .cse1 (< (mod (+ 32 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 34) 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ 23 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod .cse6 4294967296) 268435455) .cse2) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 24) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 12) 4294967296) 268435455)) (or .cse0 (< (mod (+ 7 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 36) 4294967296) 268435455)) (or (< (mod (+ 30 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse3) (or .cse2 (< (mod (+ 29 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ 19 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod |c_ULTIMATE.start_main_~v~0#1| 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 37) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ 35 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 14 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 5 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2)))) is different from false [2021-11-25 18:31:46,243 WARN L227 SmtUtils]: Spent 1.10m on a formula simplification. DAG size of input: 206 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:31:48,326 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (+ |c_ULTIMATE.start_main_~v~0#1| 1)) (.cse4 (+ 2 |c_ULTIMATE.start_main_~v~0#1|)) (.cse5 (+ 3 |c_ULTIMATE.start_main_~v~0#1|))) (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~v~0#1| 4) 0)) (.cse0 (= (mod .cse5 4) 0)) (.cse3 (= (mod .cse4 4) 0)) (.cse2 (= (mod .cse6 4) 0))) (and (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 11) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 20) 4294967296) 268435455)) (or (< (mod (+ 21 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2) (or .cse2 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 13) 4294967296) 268435455)) (or .cse0 (< (mod (+ 31 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 25) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 27) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 8) 4294967296) 268435455)) (or .cse3 (< (mod (+ 22 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 6 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ 16 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 28) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 10) 4294967296) 268435455)) (or .cse3 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 26) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 17) 4294967296) 268435455) .cse2) (or (< (mod .cse4 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 15) 4294967296) 268435455)) (or .cse2 (< (mod (+ 9 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 4) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 33) 4294967296) 268435455) .cse2) (or (< (mod .cse5 4294967296) 268435455) .cse0) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 18) 4294967296) 268435455) .cse3) (or .cse1 (< (mod (+ 32 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 34) 4294967296) 268435455) .cse3) (or .cse0 (< (mod (+ 23 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod .cse6 4294967296) 268435455) .cse2) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 24) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 12) 4294967296) 268435455)) (or .cse0 (< (mod (+ 7 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 36) 4294967296) 268435455)) (or (< (mod (+ 30 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse3) (or .cse2 (< (mod (+ 29 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse0 (< (mod (+ 19 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse1 (< (mod |c_ULTIMATE.start_main_~v~0#1| 4294967296) 268435455)) (or (< (mod (+ |c_ULTIMATE.start_main_~v~0#1| 37) 4294967296) 268435455) .cse2) (or .cse0 (< (mod (+ 35 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or .cse3 (< (mod (+ 14 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455)) (or (< (mod (+ 5 |c_ULTIMATE.start_main_~v~0#1|) 4294967296) 268435455) .cse2)))) is different from false