./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max20-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:31:07,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:31:07,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:31:07,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:31:07,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:31:07,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:31:07,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:31:07,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:31:07,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:31:07,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:31:07,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:31:07,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:31:07,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:31:07,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:31:07,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:31:07,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:31:07,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:31:07,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:31:07,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:31:07,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:31:07,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:31:07,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:31:07,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:31:07,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:31:07,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:31:07,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:31:07,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:31:07,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:31:07,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:31:07,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:31:07,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:31:07,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:31:07,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:31:07,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:31:07,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:31:07,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:31:07,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:31:07,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:31:07,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:31:07,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:31:07,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:31:07,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:31:07,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:31:07,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:31:07,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:31:07,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:31:07,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:31:07,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:31:07,108 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:31:07,108 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:31:07,108 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:31:07,108 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:31:07,108 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:31:07,109 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:31:07,109 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:31:07,109 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:31:07,109 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:31:07,109 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:31:07,109 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:31:07,109 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:31:07,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:31:07,110 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:31:07,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:31:07,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:31:07,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:31:07,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:31:07,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:31:07,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:31:07,111 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:31:07,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:31:07,111 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:31:07,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:31:07,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:31:07,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:31:07,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:31:07,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:31:07,112 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:31:07,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:31:07,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:31:07,112 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:31:07,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:31:07,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:31:07,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:31:07,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 [2022-12-14 10:31:07,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:31:07,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:31:07,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:31:07,313 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:31:07,313 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:31:07,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/reducercommutativity/max20-1.i [2022-12-14 10:31:09,917 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:31:10,077 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:31:10,078 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/sv-benchmarks/c/reducercommutativity/max20-1.i [2022-12-14 10:31:10,082 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/data/5a57aefb1/dc24974dbfbf4456b256b2a0152e1e65/FLAG9d000b07b [2022-12-14 10:31:10,094 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/data/5a57aefb1/dc24974dbfbf4456b256b2a0152e1e65 [2022-12-14 10:31:10,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:31:10,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:31:10,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:31:10,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:31:10,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:31:10,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14788c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10, skipping insertion in model container [2022-12-14 10:31:10,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:31:10,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:31:10,231 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2022-12-14 10:31:10,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:31:10,241 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:31:10,256 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2022-12-14 10:31:10,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:31:10,266 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:31:10,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10 WrapperNode [2022-12-14 10:31:10,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:31:10,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:31:10,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:31:10,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:31:10,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,291 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-12-14 10:31:10,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:31:10,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:31:10,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:31:10,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:31:10,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,307 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:31:10,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:31:10,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:31:10,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:31:10,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (1/1) ... [2022-12-14 10:31:10,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:31:10,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:10,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:31:10,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:31:10,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:31:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-12-14 10:31:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-12-14 10:31:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:31:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:31:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:31:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:31:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:31:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:31:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:31:10,441 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:31:10,443 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:31:10,572 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:31:10,633 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:31:10,634 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 10:31:10,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:31:10 BoogieIcfgContainer [2022-12-14 10:31:10,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:31:10,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:31:10,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:31:10,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:31:10,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:31:10" (1/3) ... [2022-12-14 10:31:10,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e9592b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:31:10, skipping insertion in model container [2022-12-14 10:31:10,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:31:10" (2/3) ... [2022-12-14 10:31:10,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e9592b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:31:10, skipping insertion in model container [2022-12-14 10:31:10,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:31:10" (3/3) ... [2022-12-14 10:31:10,647 INFO L112 eAbstractionObserver]: Analyzing ICFG max20-1.i [2022-12-14 10:31:10,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:31:10,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:31:10,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:31:10,709 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@af2355f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:31:10,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:31:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:31:10,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:10,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:10,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:10,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1438378950, now seen corresponding path program 1 times [2022-12-14 10:31:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:10,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977509520] [2022-12-14 10:31:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:10,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:31:10,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977509520] [2022-12-14 10:31:10,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977509520] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:31:10,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:31:10,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:31:10,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79199087] [2022-12-14 10:31:10,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:31:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:31:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:31:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:31:11,007 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:31:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:11,045 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-12-14 10:31:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:31:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-12-14 10:31:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:11,053 INFO L225 Difference]: With dead ends: 33 [2022-12-14 10:31:11,053 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 10:31:11,055 INFO L412 NwaCegarLoop]: 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 [2022-12-14 10:31:11,057 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:11,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 10:31:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 10:31:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-12-14 10:31:11,093 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-12-14 10:31:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:11,093 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-12-14 10:31:11,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:31:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-12-14 10:31:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 10:31:11,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:11,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:11,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:31:11,096 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1900472846, now seen corresponding path program 1 times [2022-12-14 10:31:11,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:11,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486915797] [2022-12-14 10:31:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:31:11,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:11,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486915797] [2022-12-14 10:31:11,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486915797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:11,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752189032] [2022-12-14 10:31:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:11,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:11,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:11,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:11,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:31:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:11,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:31:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:31:11,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:31:11,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752189032] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:31:11,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:31:11,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 10:31:11,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633281214] [2022-12-14 10:31:11,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:31:11,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:31:11,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:11,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:31:11,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:31:11,315 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:31:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:11,336 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-12-14 10:31:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:31:11,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-12-14 10:31:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:11,337 INFO L225 Difference]: With dead ends: 29 [2022-12-14 10:31:11,337 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 10:31:11,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:31:11,339 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:11,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 10:31:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 10:31:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 10:31:11,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-12-14 10:31:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:11,345 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 10:31:11,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:31:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 10:31:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 10:31:11,346 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:11,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:11,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:31:11,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 10:31:11,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1710545452, now seen corresponding path program 1 times [2022-12-14 10:31:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:11,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947367648] [2022-12-14 10:31:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:11,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 10:31:11,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947367648] [2022-12-14 10:31:11,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947367648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835923522] [2022-12-14 10:31:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:11,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:11,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:11,733 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:11,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:31:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:11,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:31:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:31:11,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:31:11,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835923522] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:31:11,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:31:11,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 10:31:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34710185] [2022-12-14 10:31:11,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:31:11,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:31:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:31:11,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:31:11,817 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:31:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:11,833 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-12-14 10:31:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:31:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-12-14 10:31:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:11,835 INFO L225 Difference]: With dead ends: 27 [2022-12-14 10:31:11,835 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 10:31:11,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:31:11,836 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:11,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 10:31:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 10:31:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-12-14 10:31:11,841 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-12-14 10:31:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:11,842 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-12-14 10:31:11,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:31:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-12-14 10:31:11,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 10:31:11,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:11,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:11,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:31:12,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:12,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2132542269, now seen corresponding path program 1 times [2022-12-14 10:31:12,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:12,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626883459] [2022-12-14 10:31:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:12,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 10:31:12,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:12,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626883459] [2022-12-14 10:31:12,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626883459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:12,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418729898] [2022-12-14 10:31:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:12,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:12,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:12,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:12,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:31:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:12,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:31:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 10:31:12,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 10:31:12,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418729898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:12,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193695182] [2022-12-14 10:31:12,379 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:31:12,380 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:12,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:12,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:12,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:12,475 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:31:12,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:31:12,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:12,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:31:12,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:12,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:31:12,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:12,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:31:12,596 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:31:12,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-12-14 10:31:12,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:31:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:12,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 10:31:12,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:12,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 10:31:12,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:12,947 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 10:31:12,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 10:31:13,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 10:31:13,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:31:13,155 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-12-14 10:31:13,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:31:13,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (exists ((v_max_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:31:13,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:31:13,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:31:13,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-12-14 10:31:13,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122874813] [2022-12-14 10:31:13,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:13,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:31:13,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:31:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:31:13,891 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 10:31:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:13,911 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-12-14 10:31:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:31:13,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-12-14 10:31:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:13,911 INFO L225 Difference]: With dead ends: 36 [2022-12-14 10:31:13,912 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 10:31:13,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:31:13,912 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:13,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 10:31:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 10:31:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 10:31:13,915 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-12-14 10:31:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:13,915 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 10:31:13,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 10:31:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 10:31:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 10:31:13,916 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:13,916 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:13,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:31:14,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:14,118 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:14,120 INFO L85 PathProgramCache]: Analyzing trace with hash -472286703, now seen corresponding path program 2 times [2022-12-14 10:31:14,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:14,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508478989] [2022-12-14 10:31:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:14,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 10:31:14,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:14,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508478989] [2022-12-14 10:31:14,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508478989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:14,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428423542] [2022-12-14 10:31:14,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:31:14,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:14,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:14,294 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:14,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:31:14,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:31:14,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:31:14,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:31:14,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 10:31:14,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 10:31:14,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428423542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:14,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747453875] [2022-12-14 10:31:14,379 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:31:14,379 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:14,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:14,380 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:14,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:14,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:14,402 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:31:14,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 10:31:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:14,419 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:31:14,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:31:14,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:14,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:31:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:14,486 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:31:14,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-12-14 10:31:14,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:31:14,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:14,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 10:31:14,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:14,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:31:14,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 10:31:14,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:14,683 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 10:31:14,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 10:31:14,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 10:31:14,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:31:14,785 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-12-14 10:31:14,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:31:21,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (exists ((v_max_~ret~0_BEFORE_RETURN_11 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_11 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_11 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_11 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:31:21,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:31:21,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:31:21,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 10:31:21,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660495963] [2022-12-14 10:31:21,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:21,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:31:21,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:31:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:31:21,434 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 10:31:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:21,453 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-12-14 10:31:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:31:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-12-14 10:31:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:21,454 INFO L225 Difference]: With dead ends: 38 [2022-12-14 10:31:21,454 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 10:31:21,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:31:21,455 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:21,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 10:31:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 10:31:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 10:31:21,460 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-12-14 10:31:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:21,460 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 10:31:21,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 10:31:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 10:31:21,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 10:31:21,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:21,461 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:21,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:31:21,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:21,663 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1407490041, now seen corresponding path program 3 times [2022-12-14 10:31:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:21,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854424797] [2022-12-14 10:31:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:21,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 10:31:21,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854424797] [2022-12-14 10:31:21,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854424797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864237520] [2022-12-14 10:31:21,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:31:21,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:21,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:21,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:21,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:31:21,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:31:21,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:31:21,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:31:21,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 10:31:21,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 10:31:21,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864237520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1595515371] [2022-12-14 10:31:21,897 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:31:21,897 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:21,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:21,898 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:21,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:21,920 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:31:21,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:31:21,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:21,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:31:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:21,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:31:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:31:21,991 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:31:21,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-12-14 10:31:22,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:31:22,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:22,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 10:31:22,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:22,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:31:22,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 10:31:22,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:22,164 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 10:31:22,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 10:31:22,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 10:31:22,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:31:22,281 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-12-14 10:31:22,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:31:32,617 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 53 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:31:32,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (exists ((v_max_~ret~0_BEFORE_RETURN_17 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_17 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_17 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_17 4294967296) (- 4294967296))))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:31:32,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:31:32,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:31:32,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-12-14 10:31:32,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305152590] [2022-12-14 10:31:32,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:32,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:31:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:32,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:31:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:31:32,936 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 10:31:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:32,965 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-12-14 10:31:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:31:32,965 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-12-14 10:31:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:32,966 INFO L225 Difference]: With dead ends: 49 [2022-12-14 10:31:32,966 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 10:31:32,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:31:32,967 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:32,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 10:31:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 10:31:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-12-14 10:31:32,970 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-12-14 10:31:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:32,970 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-12-14 10:31:32,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 10:31:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-12-14 10:31:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:31:32,971 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:32,971 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:32,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 10:31:33,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:33,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:33,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1999877338, now seen corresponding path program 4 times [2022-12-14 10:31:33,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:33,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912248625] [2022-12-14 10:31:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:33,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 10:31:33,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:33,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912248625] [2022-12-14 10:31:33,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912248625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:33,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196400524] [2022-12-14 10:31:33,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:31:33,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:33,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:33,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:33,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:31:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:31:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 10:31:33,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 10:31:33,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196400524] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:33,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801208055] [2022-12-14 10:31:33,647 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:31:33,647 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:33,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:33,647 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:33,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:33,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:33,665 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:31:33,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 10:31:33,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:33,680 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:31:33,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:31:33,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:33,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:31:33,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:33,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:33,742 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:31:33,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-12-14 10:31:33,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:31:33,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:33,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 10:31:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:33,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:31:33,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 10:31:33,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:33,903 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 10:31:33,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 10:31:33,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 10:31:33,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:31:34,002 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-12-14 10:31:34,035 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:31:40,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1572#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (exists ((v_max_~ret~0_BEFORE_RETURN_24 Int)) (= (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_24 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_24 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_24 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:31:40,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:31:40,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:31:40,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 23 [2022-12-14 10:31:40,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293151503] [2022-12-14 10:31:40,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:40,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:31:40,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:31:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:31:40,814 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 10:31:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:40,844 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2022-12-14 10:31:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:31:40,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-12-14 10:31:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:40,845 INFO L225 Difference]: With dead ends: 60 [2022-12-14 10:31:40,845 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 10:31:40,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:31:40,845 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:40,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 10:31:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 10:31:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-12-14 10:31:40,849 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 44 [2022-12-14 10:31:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:40,849 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-12-14 10:31:40,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 10:31:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-12-14 10:31:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 10:31:40,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:40,850 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:40,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:31:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:41,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:41,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:41,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1427478874, now seen corresponding path program 5 times [2022-12-14 10:31:41,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:41,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991088571] [2022-12-14 10:31:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:41,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-12-14 10:31:41,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:41,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991088571] [2022-12-14 10:31:41,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991088571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:41,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301162362] [2022-12-14 10:31:41,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:31:41,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:41,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:41,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:41,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:31:41,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:31:41,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:31:41,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:31:41,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-12-14 10:31:41,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-12-14 10:31:41,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301162362] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:41,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020121140] [2022-12-14 10:31:41,363 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:31:41,363 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:41,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:41,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:41,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:41,382 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:31:41,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:31:41,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:41,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:31:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:41,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:31:41,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:41,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:41,436 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:31:41,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-12-14 10:31:41,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:31:41,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:41,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 10:31:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:41,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 10:31:41,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:41,610 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 10:31:41,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 10:31:41,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 10:31:41,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:31:41,740 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-12-14 10:31:41,777 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:31:42,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2095#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (exists ((v_max_~ret~0_BEFORE_RETURN_29 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_29 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_29 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_29 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:31:42,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:31:42,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:31:42,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-12-14 10:31:42,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138668155] [2022-12-14 10:31:42,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:42,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:31:42,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:42,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:31:42,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:31:42,466 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 10:31:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:42,493 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-12-14 10:31:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:31:42,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-12-14 10:31:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:42,494 INFO L225 Difference]: With dead ends: 64 [2022-12-14 10:31:42,495 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 10:31:42,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:31:42,496 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:42,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 10:31:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-14 10:31:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-12-14 10:31:42,501 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2022-12-14 10:31:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:42,502 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-12-14 10:31:42,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 10:31:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-12-14 10:31:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 10:31:42,503 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:42,503 INFO L195 NwaCegarLoop]: trace histogram [20, 15, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:42,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:31:42,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 10:31:42,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash -725058720, now seen corresponding path program 6 times [2022-12-14 10:31:42,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:42,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137230341] [2022-12-14 10:31:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:42,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-12-14 10:31:42,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137230341] [2022-12-14 10:31:42,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137230341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799322979] [2022-12-14 10:31:42,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:31:42,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:42,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:42,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:42,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:31:42,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:31:42,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:31:42,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:31:42,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 74 proven. 15 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-12-14 10:31:43,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-12-14 10:31:43,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799322979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:43,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053715688] [2022-12-14 10:31:43,063 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:31:43,063 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:43,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:43,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:43,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:43,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:43,085 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:31:43,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:31:43,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:43,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:31:43,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:43,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:31:43,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:43,138 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:31:43,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-12-14 10:31:43,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:31:43,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:43,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 10:31:43,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:43,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:31:43,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 10:31:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:43,276 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 10:31:43,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 10:31:43,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 10:31:43,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:31:43,385 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-12-14 10:31:43,419 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:31:44,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2680#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (exists ((v_max_~ret~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_36 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_36 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_36 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:31:44,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:31:44,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:31:44,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-12-14 10:31:44,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343682985] [2022-12-14 10:31:44,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:44,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:31:44,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:44,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:31:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:31:44,092 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:31:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:44,120 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2022-12-14 10:31:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:31:44,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2022-12-14 10:31:44,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:44,121 INFO L225 Difference]: With dead ends: 76 [2022-12-14 10:31:44,122 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 10:31:44,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:31:44,123 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:44,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:44,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 10:31:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-14 10:31:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-12-14 10:31:44,128 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 61 [2022-12-14 10:31:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:44,129 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-12-14 10:31:44,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:31:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-12-14 10:31:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 10:31:44,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:44,130 INFO L195 NwaCegarLoop]: trace histogram [36, 20, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:44,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 10:31:44,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:44,332 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2026518938, now seen corresponding path program 7 times [2022-12-14 10:31:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413337164] [2022-12-14 10:31:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 418 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-12-14 10:31:44,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413337164] [2022-12-14 10:31:44,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413337164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614545615] [2022-12-14 10:31:44,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:31:44,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:44,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:44,721 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:44,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:31:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:44,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:31:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 340 proven. 78 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-12-14 10:31:44,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 418 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-12-14 10:31:45,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614545615] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:45,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297714754] [2022-12-14 10:31:45,034 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:31:45,034 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:45,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:45,035 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:45,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:45,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:45,056 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:31:45,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:31:45,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:45,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:31:45,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:45,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:31:45,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:45,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:31:45,119 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:31:45,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-12-14 10:31:45,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:31:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:45,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 10:31:45,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:45,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 10:31:45,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:45,292 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-12-14 10:31:45,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-12-14 10:31:45,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 10:31:45,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:31:45,401 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-12-14 10:31:45,435 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:31:46,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3437#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (exists ((v_max_~ret~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_41 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_41 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_41 4294967296))))) (= |#NULL.base| 0))' at error location [2022-12-14 10:31:46,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:31:46,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:31:46,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-12-14 10:31:46,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289909857] [2022-12-14 10:31:46,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:46,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:31:46,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:31:46,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:31:46,175 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:31:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:46,205 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2022-12-14 10:31:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:31:46,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 82 [2022-12-14 10:31:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:46,206 INFO L225 Difference]: With dead ends: 91 [2022-12-14 10:31:46,206 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 10:31:46,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:31:46,208 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:46,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:46,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 10:31:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-12-14 10:31:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-12-14 10:31:46,213 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2022-12-14 10:31:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:46,214 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-12-14 10:31:46,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:31:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-12-14 10:31:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 10:31:46,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:46,215 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:46,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:31:46,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:46,416 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:46,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1432846694, now seen corresponding path program 8 times [2022-12-14 10:31:46,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:46,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640871667] [2022-12-14 10:31:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:46,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-12-14 10:31:46,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:46,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640871667] [2022-12-14 10:31:46,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640871667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:46,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860184931] [2022-12-14 10:31:46,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:31:46,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:46,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:46,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:46,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:31:46,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 10:31:46,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:31:46,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:31:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 886 proven. 21 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-12-14 10:31:46,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-12-14 10:31:47,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860184931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:47,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169322371] [2022-12-14 10:31:47,033 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:31:47,033 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:47,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:47,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:47,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:47,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:47,051 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:31:47,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:31:47,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:47,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:31:47,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:47,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:31:47,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:47,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:47,117 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:31:47,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-12-14 10:31:47,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:31:47,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:47,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 10:31:47,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:47,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 10:31:47,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:47,253 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 10:31:47,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 10:31:47,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 10:31:47,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:31:47,370 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-12-14 10:31:47,403 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:31:52,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4378#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_max_~ret~0_BEFORE_RETURN_47 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_47 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_47 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_47 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:31:52,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:31:52,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:31:52,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-14 10:31:52,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848050083] [2022-12-14 10:31:52,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:52,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:31:52,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:52,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:31:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:31:52,043 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:31:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:52,069 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2022-12-14 10:31:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:31:52,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 106 [2022-12-14 10:31:52,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:52,069 INFO L225 Difference]: With dead ends: 97 [2022-12-14 10:31:52,070 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 10:31:52,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:31:52,070 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:52,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 10:31:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-12-14 10:31:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-12-14 10:31:52,076 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 106 [2022-12-14 10:31:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:52,076 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-12-14 10:31:52,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:31:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-12-14 10:31:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 10:31:52,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:52,078 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:52,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:31:52,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 10:31:52,280 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:52,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1885689114, now seen corresponding path program 9 times [2022-12-14 10:31:52,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:52,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55775464] [2022-12-14 10:31:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:52,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:31:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:31:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-12-14 10:31:52,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:31:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55775464] [2022-12-14 10:31:52,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55775464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:31:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740085775] [2022-12-14 10:31:52,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:31:52,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:31:52,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:31:52,657 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:31:52,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:31:52,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:31:52,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:31:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:31:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:31:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 886 proven. 105 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-12-14 10:31:52,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:31:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-12-14 10:31:53,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740085775] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:53,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648432828] [2022-12-14 10:31:53,022 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:31:53,022 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:31:53,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:31:53,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:31:53,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:31:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:53,041 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:31:53,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:31:53,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:53,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:31:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:53,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 10:31:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:53,093 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:31:53,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-12-14 10:31:53,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:31:53,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:53,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 10:31:53,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:53,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 10:31:53,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:31:53,259 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 10:31:53,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 10:31:53,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 10:31:53,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:31:53,374 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-12-14 10:31:53,408 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:31:58,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5402#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (exists ((v_max_~ret~0_BEFORE_RETURN_54 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_54 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_54 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_54 4294967296) (- 4294967296))))))' at error location [2022-12-14 10:31:58,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:31:58,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:31:58,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-12-14 10:31:58,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913167184] [2022-12-14 10:31:58,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:58,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:31:58,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:31:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:31:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:31:58,205 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:31:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:31:58,249 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2022-12-14 10:31:58,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 10:31:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 114 [2022-12-14 10:31:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:31:58,251 INFO L225 Difference]: With dead ends: 102 [2022-12-14 10:31:58,251 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 10:31:58,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 313 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:31:58,252 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:31:58,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:31:58,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 10:31:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-12-14 10:31:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:31:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-12-14 10:31:58,258 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 114 [2022-12-14 10:31:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:31:58,258 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-12-14 10:31:58,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:31:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-12-14 10:31:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 10:31:58,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:31:58,259 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 19, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:31:58,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 10:31:58,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7c7f189-4cc5-425f-9037-f20ea88f77f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:31:58,460 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:31:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:31:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash 206596761, now seen corresponding path program 10 times [2022-12-14 10:31:58,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:31:58,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597813920] [2022-12-14 10:31:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:31:58,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:34:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat