./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI --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 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e --- 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-5e519f3 [2022-11-03 03:35:35,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:35:35,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:35:35,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:35:35,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:35:35,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:35:35,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:35:35,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:35:35,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:35:35,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:35:35,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:35:35,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:35:35,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:35:35,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:35:35,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:35:35,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:35:35,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:35:35,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:35:35,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:35:35,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:35:35,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:35:35,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:35:35,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:35:35,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:35:35,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:35:35,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:35:35,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:35:35,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:35:35,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:35:35,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:35:35,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:35:35,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:35:35,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:35:35,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:35:35,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:35:35,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:35:35,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:35:35,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:35:35,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:35:35,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:35:35,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:35:35,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:35:35,132 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:35:35,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:35:35,133 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:35:35,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:35:35,134 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:35:35,135 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:35:35,135 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:35:35,135 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:35:35,136 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:35:35,136 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:35:35,136 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:35:35,137 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:35:35,137 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:35:35,137 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:35:35,138 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:35:35,138 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:35:35,138 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:35:35,139 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:35:35,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:35:35,140 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:35:35,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:35:35,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:35:35,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:35:35,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:35:35,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:35:35,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:35:35,142 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:35:35,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:35:35,143 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:35:35,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:35:35,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:35:35,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:35:35,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:35:35,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:35:35,145 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:35:35,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:35:35,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:35:35,146 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:35:35,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:35:35,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:35:35,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:35:35,147 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_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e [2022-11-03 03:35:35,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:35:35,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:35:35,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:35:35,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:35:35,567 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:35:35,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/reducercommutativity/max.i [2022-11-03 03:35:35,653 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/data/54f4d034c/bc95091217db421f923efe685df18ccf/FLAG4665ec076 [2022-11-03 03:35:36,208 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:35:36,209 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/sv-benchmarks/c/reducercommutativity/max.i [2022-11-03 03:35:36,218 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/data/54f4d034c/bc95091217db421f923efe685df18ccf/FLAG4665ec076 [2022-11-03 03:35:36,530 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/data/54f4d034c/bc95091217db421f923efe685df18ccf [2022-11-03 03:35:36,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:35:36,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:35:36,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:35:36,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:35:36,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:35:36,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db2df45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36, skipping insertion in model container [2022-11-03 03:35:36,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:35:36,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:35:36,847 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/sv-benchmarks/c/reducercommutativity/max.i[1295,1308] [2022-11-03 03:35:36,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:35:36,857 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:35:36,879 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/sv-benchmarks/c/reducercommutativity/max.i[1295,1308] [2022-11-03 03:35:36,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:35:36,896 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:35:36,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36 WrapperNode [2022-11-03 03:35:36,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:35:36,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:35:36,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:35:36,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:35:36,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,937 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-11-03 03:35:36,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:35:36,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:35:36,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:35:36,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:35:36,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,964 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:35:36,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:35:36,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:35:36,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:35:36,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (1/1) ... [2022-11-03 03:35:36,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:35:36,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:37,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:35:37,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:35:37,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:35:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-03 03:35:37,069 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-03 03:35:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:35:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:35:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:35:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:35:37,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:35:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:35:37,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:35:37,151 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:35:37,154 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:35:37,393 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:35:37,465 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:35:37,465 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 03:35:37,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:35:37 BoogieIcfgContainer [2022-11-03 03:35:37,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:35:37,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:35:37,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:35:37,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:35:37,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:35:36" (1/3) ... [2022-11-03 03:35:37,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5173a587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:35:37, skipping insertion in model container [2022-11-03 03:35:37,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:36" (2/3) ... [2022-11-03 03:35:37,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5173a587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:35:37, skipping insertion in model container [2022-11-03 03:35:37,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:35:37" (3/3) ... [2022-11-03 03:35:37,480 INFO L112 eAbstractionObserver]: Analyzing ICFG max.i [2022-11-03 03:35:37,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:35:37,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:35:37,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:35:37,567 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;@4a8cee40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:35:37,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:35:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-11-03 03:35:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:35:37,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:37,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:37,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash 150020737, now seen corresponding path program 1 times [2022-11-03 03:35:37,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:37,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492174671] [2022-11-03 03:35:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:37,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:35:38,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:38,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492174671] [2022-11-03 03:35:38,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492174671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:38,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126640910] [2022-11-03 03:35:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:38,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:38,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:38,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:38,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:35:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:38,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:35:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:35:38,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:35:38,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126640910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:38,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:35:38,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-03 03:35:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758099863] [2022-11-03 03:35:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:38,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:35:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:35:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:35:38,448 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-03 03:35:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:38,547 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-03 03:35:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:35:38,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 20 [2022-11-03 03:35:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:38,557 INFO L225 Difference]: With dead ends: 36 [2022-11-03 03:35:38,557 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 03:35:38,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:35:38,564 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:38,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:35:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 03:35:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 03:35:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-11-03 03:35:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-03 03:35:38,618 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 20 [2022-11-03 03:35:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:38,619 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-03 03:35:38,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-03 03:35:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-03 03:35:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:35:38,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:38,621 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:38,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:38,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 03:35:38,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:38,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1246840564, now seen corresponding path program 1 times [2022-11-03 03:35:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:38,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510120928] [2022-11-03 03:35:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:38,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:35:39,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:39,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510120928] [2022-11-03 03:35:39,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510120928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:39,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:35:39,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:35:39,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738557955] [2022-11-03 03:35:39,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:35:39,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:39,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:35:39,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:35:39,056 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:35:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:39,092 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-03 03:35:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:35:39,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-03 03:35:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:39,094 INFO L225 Difference]: With dead ends: 26 [2022-11-03 03:35:39,095 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 03:35:39,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:35:39,097 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:39,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:35:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 03:35:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 03:35:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2022-11-03 03:35:39,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-03 03:35:39,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 23 [2022-11-03 03:35:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:39,105 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-03 03:35:39,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:35:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-03 03:35:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 03:35:39,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:39,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:39,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:35:39,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash -455122768, now seen corresponding path program 1 times [2022-11-03 03:35:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:39,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435779814] [2022-11-03 03:35:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:39,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:35:39,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:39,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435779814] [2022-11-03 03:35:39,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435779814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:39,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431333138] [2022-11-03 03:35:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:39,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:39,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:39,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:39,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:35:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:35:39,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:35:39,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:35:39,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431333138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:39,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [616001128] [2022-11-03 03:35:39,675 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:35:39,675 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:35:39,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:35:39,685 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:35:39,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:35:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:39,792 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-03 03:35:39,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 28 [2022-11-03 03:35:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:39,859 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:35:39,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:40,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:40,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:40,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:40,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:40,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:40,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:40,320 INFO L356 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-11-03 03:35:40,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 303 treesize of output 285 [2022-11-03 03:35:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:40,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 03:35:41,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:41,051 INFO L356 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-03 03:35:41,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 83 [2022-11-03 03:35:41,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 03:35:41,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:41,469 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 17 for LOIs [2022-11-03 03:35:41,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:35:45,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '373#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~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|))) (<= 1 ~N~0) (<= 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)) (exists ((v_max_~ret~0_BEFORE_RETURN_6 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296))))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:35:45,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:35:45,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:35:45,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-11-03 03:35:45,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262279144] [2022-11-03 03:35:45,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:45,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:35:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:35:45,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:35:45,590 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 03:35:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:45,683 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-11-03 03:35:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:35:45,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 24 [2022-11-03 03:35:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:45,685 INFO L225 Difference]: With dead ends: 32 [2022-11-03 03:35:45,685 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 03:35:45,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:35:45,691 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:45,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:35:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 03:35:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-03 03:35:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2022-11-03 03:35:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-03 03:35:45,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 24 [2022-11-03 03:35:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:45,706 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-03 03:35:45,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 03:35:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-03 03:35:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:35:45,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:45,709 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:45,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:45,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87da938b-3aa4-42cf-8054-e0c67b382b84/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:45,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:45,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:45,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2007840381, now seen corresponding path program 2 times [2022-11-03 03:35:45,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:45,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537050729] [2022-11-03 03:35:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:45,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat