./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW --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 02f02b7f59fc1c3b5c77751f648b2e92e85109b700d3d48af7999437b36b94ea --- 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-4e7fbc6 [2022-11-23 13:53:21,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:53:21,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:53:22,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:53:22,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:53:22,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:53:22,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:53:22,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:53:22,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:53:22,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:53:22,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:53:22,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:53:22,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:53:22,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:53:22,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:53:22,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:53:22,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:53:22,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:53:22,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:53:22,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:53:22,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:53:22,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:53:22,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:53:22,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:53:22,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:53:22,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:53:22,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:53:22,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:53:22,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:53:22,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:53:22,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:53:22,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:53:22,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:53:22,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:53:22,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:53:22,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:53:22,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:53:22,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:53:22,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:53:22,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:53:22,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:53:22,052 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:53:22,088 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:53:22,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:53:22,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:53:22,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:53:22,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:53:22,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:53:22,091 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:53:22,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:53:22,091 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:53:22,091 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:53:22,092 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:53:22,093 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:53:22,093 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:53:22,093 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:53:22,093 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:53:22,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:53:22,094 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:53:22,094 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:53:22,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:53:22,095 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:53:22,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:53:22,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:53:22,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:53:22,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:53:22,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:53:22,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:53:22,097 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:53:22,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:53:22,097 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:53:22,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:53:22,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:53:22,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:53:22,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:53:22,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:53:22,098 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:53:22,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:53:22,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:53:22,099 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:53:22,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:53:22,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:53:22,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:53:22,100 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_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02f02b7f59fc1c3b5c77751f648b2e92e85109b700d3d48af7999437b36b94ea [2022-11-23 13:53:22,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:53:22,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:53:22,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:53:22,414 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:53:22,415 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:53:22,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/reducercommutativity/avg05-1.i [2022-11-23 13:53:25,517 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:53:25,772 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:53:25,774 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/sv-benchmarks/c/reducercommutativity/avg05-1.i [2022-11-23 13:53:25,781 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/data/9775c1615/af055c15b2fd4f139426b5d0d5dece1b/FLAG65cab9394 [2022-11-23 13:53:25,797 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/data/9775c1615/af055c15b2fd4f139426b5d0d5dece1b [2022-11-23 13:53:25,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:53:25,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:53:25,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:53:25,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:53:25,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:53:25,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:53:25" (1/1) ... [2022-11-23 13:53:25,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703f6c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:25, skipping insertion in model container [2022-11-23 13:53:25,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:53:25" (1/1) ... [2022-11-23 13:53:25,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:53:25,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:53:25,985 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_62076f41-66af-4299-aaf9-46163372e1f2/sv-benchmarks/c/reducercommutativity/avg05-1.i[1275,1288] [2022-11-23 13:53:25,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:53:25,996 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:53:26,016 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_62076f41-66af-4299-aaf9-46163372e1f2/sv-benchmarks/c/reducercommutativity/avg05-1.i[1275,1288] [2022-11-23 13:53:26,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:53:26,029 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:53:26,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26 WrapperNode [2022-11-23 13:53:26,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:53:26,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:53:26,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:53:26,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:53:26,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,088 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-23 13:53:26,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:53:26,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:53:26,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:53:26,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:53:26,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,130 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:53:26,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:53:26,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:53:26,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:53:26,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (1/1) ... [2022-11-23 13:53:26,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:53:26,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:26,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:53:26,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:53:26,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:53:26,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:53:26,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:53:26,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:53:26,221 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-11-23 13:53:26,221 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-11-23 13:53:26,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:53:26,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:53:26,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:53:26,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:53:26,312 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:53:26,314 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:53:26,555 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:53:26,626 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:53:26,626 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 13:53:26,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:53:26 BoogieIcfgContainer [2022-11-23 13:53:26,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:53:26,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:53:26,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:53:26,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:53:26,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:53:25" (1/3) ... [2022-11-23 13:53:26,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7c580b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:53:26, skipping insertion in model container [2022-11-23 13:53:26,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:26" (2/3) ... [2022-11-23 13:53:26,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7c580b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:53:26, skipping insertion in model container [2022-11-23 13:53:26,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:53:26" (3/3) ... [2022-11-23 13:53:26,648 INFO L112 eAbstractionObserver]: Analyzing ICFG avg05-1.i [2022-11-23 13:53:26,667 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:53:26,667 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:53:26,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:53:26,741 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;@254071ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:53:26,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 13:53:26,746 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) [2022-11-23 13:53:26,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 13:53:26,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:26,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:26,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1847977284, now seen corresponding path program 1 times [2022-11-23 13:53:26,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:26,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305787408] [2022-11-23 13:53:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 13:53:27,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305787408] [2022-11-23 13:53:27,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305787408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:27,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:27,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:53:27,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720780251] [2022-11-23 13:53:27,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:27,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:53:27,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:53:27,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:27,182 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) [2022-11-23 13:53:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:27,227 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-23 13:53:27,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:53:27,230 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 [2022-11-23 13:53:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:27,237 INFO L225 Difference]: With dead ends: 33 [2022-11-23 13:53:27,238 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 13:53:27,240 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 [2022-11-23 13:53:27,244 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 [2022-11-23 13:53:27,245 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] [2022-11-23 13:53:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 13:53:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 13:53:27,279 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) [2022-11-23 13:53:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-23 13:53:27,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-23 13:53:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:27,282 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-23 13:53:27,282 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) [2022-11-23 13:53:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-23 13:53:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 13:53:27,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:27,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:27,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:53:27,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:27,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:27,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1923649121, now seen corresponding path program 1 times [2022-11-23 13:53:27,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:27,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464657285] [2022-11-23 13:53:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:27,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 13:53:27,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:27,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464657285] [2022-11-23 13:53:27,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464657285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:27,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268172625] [2022-11-23 13:53:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:27,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:27,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:27,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:27,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:53:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:53:27,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:53:27,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:53:27,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268172625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:27,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:53:27,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 13:53:27,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776388787] [2022-11-23 13:53:27,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:27,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:53:27,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:53:27,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:53:27,649 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) [2022-11-23 13:53:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:27,669 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-23 13:53:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:53:27,670 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 [2022-11-23 13:53:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:27,670 INFO L225 Difference]: With dead ends: 29 [2022-11-23 13:53:27,670 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 13:53:27,671 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 [2022-11-23 13:53:27,672 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 [2022-11-23 13:53:27,673 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] [2022-11-23 13:53:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 13:53:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 13:53:27,677 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) [2022-11-23 13:53:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-23 13:53:27,678 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-23 13:53:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:27,678 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-23 13:53:27,678 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) [2022-11-23 13:53:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-23 13:53:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 13:53:27,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:27,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:27,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:27,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 13:53:27,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:27,885 INFO L85 PathProgramCache]: Analyzing trace with hash -55252021, now seen corresponding path program 1 times [2022-11-23 13:53:27,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:27,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671815098] [2022-11-23 13:53:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:27,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 13:53:28,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671815098] [2022-11-23 13:53:28,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671815098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:28,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225764671] [2022-11-23 13:53:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:28,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:28,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:28,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:28,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:53:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:53:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 13:53:28,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:53:28,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225764671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:28,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:53:28,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 13:53:28,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768883683] [2022-11-23 13:53:28,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:28,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:53:28,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:53:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:53:28,204 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) [2022-11-23 13:53:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:28,223 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-23 13:53:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:53:28,224 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 [2022-11-23 13:53:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:28,225 INFO L225 Difference]: With dead ends: 27 [2022-11-23 13:53:28,225 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 13:53:28,225 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 [2022-11-23 13:53:28,226 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 [2022-11-23 13:53:28,227 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] [2022-11-23 13:53:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 13:53:28,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 13:53:28,231 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) [2022-11-23 13:53:28,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-23 13:53:28,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-23 13:53:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:28,234 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-23 13:53:28,234 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) [2022-11-23 13:53:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-23 13:53:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 13:53:28,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:28,235 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:28,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:53:28,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:28,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1228256621, now seen corresponding path program 1 times [2022-11-23 13:53:28,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:28,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854315283] [2022-11-23 13:53:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 13:53:28,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854315283] [2022-11-23 13:53:28,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854315283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:28,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760921349] [2022-11-23 13:53:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:28,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:28,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:28,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:53:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:28,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:53:28,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 13:53:28,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 13:53:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760921349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783104774] [2022-11-23 13:53:28,835 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 13:53:28,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:53:28,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:53:28,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:53:28,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:53:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:28,952 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 13:53:28,953 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 [2022-11-23 13:53:28,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:28,973 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 [2022-11-23 13:53:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:29,014 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 [2022-11-23 13:53:29,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:29,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:53:29,162 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 13:53:29,163 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 [2022-11-23 13:53:29,342 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 [2022-11-23 13:53:29,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:29,466 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 [2022-11-23 13:53:29,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:29,609 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 [2022-11-23 13:53:29,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:53:29,674 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-23 13:53:29,674 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 [2022-11-23 13:53:29,752 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 [2022-11-23 13:53:29,765 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 [2022-11-23 13:53:29,958 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-23 13:53:30,003 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:54:15,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~i~2#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)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_avg_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 5) 0)) (< v_avg_~ret~0_BEFORE_RETURN_5 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 5)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 5) 0)) (< v_avg_~ret~0_BEFORE_RETURN_5 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 5)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 5) 0)) (< v_avg_~ret~0_BEFORE_RETURN_5 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 5)) 4294967296) (- 4294967296))))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:54:15,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:54:15,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:54:15,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-23 13:54:15,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771279880] [2022-11-23 13:54:15,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:15,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:54:15,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:54:15,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:54:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-23 13:54:15,547 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) [2022-11-23 13:54:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:15,581 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-23 13:54:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:54:15,582 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 [2022-11-23 13:54:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:15,582 INFO L225 Difference]: With dead ends: 36 [2022-11-23 13:54:15,582 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 13:54:15,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-23 13:54:15,584 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:15,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:54:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 13:54:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 13:54:15,588 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) [2022-11-23 13:54:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-23 13:54:15,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-23 13:54:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:15,590 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-23 13:54:15,590 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) [2022-11-23 13:54:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-23 13:54:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 13:54:15,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:15,591 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:15,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:15,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:15,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:15,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:15,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2048081288, now seen corresponding path program 2 times [2022-11-23 13:54:15,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:15,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579880584] [2022-11-23 13:54:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:15,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 13:54:15,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:54:15,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579880584] [2022-11-23 13:54:15,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579880584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:54:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728093312] [2022-11-23 13:54:15,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:54:15,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:15,886 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:15,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:54:15,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:54:15,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:54:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:54:15,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 13:54:16,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 13:54:16,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728093312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:16,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339764341] [2022-11-23 13:54:16,032 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 13:54:16,033 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:54:16,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:54:16,033 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:54:16,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:54:16,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:16,064 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 13:54:16,065 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 [2022-11-23 13:54:16,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:16,075 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 [2022-11-23 13:54:16,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:16,093 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 [2022-11-23 13:54:16,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:16,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:16,172 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 13:54:16,172 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 [2022-11-23 13:54:16,218 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 [2022-11-23 13:54:16,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:16,283 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 [2022-11-23 13:54:16,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:16,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:54:16,408 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 [2022-11-23 13:54:16,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:54:16,483 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 13:54:16,483 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 [2022-11-23 13:54:16,519 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 [2022-11-23 13:54:16,530 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 [2022-11-23 13:54:16,661 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-23 13:54:16,692 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:55:01,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 4 |ULTIMATE.start_main_~i~2#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) (exists ((v_avg_~ret~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 5) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 5)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 5) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 5)) 4294967296) (+ (- 4294967296) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 5) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 5)) 4294967296))))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#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 [2022-11-23 13:55:01,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:55:01,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:55:01,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 13:55:01,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780251167] [2022-11-23 13:55:01,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:55:01,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:55:01,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:55:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:55:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-23 13:55:01,908 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) [2022-11-23 13:55:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:01,941 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-23 13:55:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:55:01,942 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 [2022-11-23 13:55:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:01,942 INFO L225 Difference]: With dead ends: 38 [2022-11-23 13:55:01,943 INFO L226 Difference]: Without dead ends: 24 [2022-11-23 13:55:01,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-23 13:55:01,944 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:01,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:55:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-23 13:55:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-23 13:55:01,948 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) [2022-11-23 13:55:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-23 13:55:01,949 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-23 13:55:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:01,950 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-23 13:55:01,950 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) [2022-11-23 13:55:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-23 13:55:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 13:55:01,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:01,951 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:55:01,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:55:02,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:02,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:55:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash -174007092, now seen corresponding path program 3 times [2022-11-23 13:55:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:55:02,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138814940] [2022-11-23 13:55:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:55:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-23 13:55:02,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:55:02,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138814940] [2022-11-23 13:55:02,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138814940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:55:02,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389095349] [2022-11-23 13:55:02,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:55:02,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:02,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:55:02,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:55:02,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:55:02,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:55:02,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:55:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:55:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-23 13:55:02,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-23 13:55:02,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389095349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:02,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308646837] [2022-11-23 13:55:02,473 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 13:55:02,473 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:55:02,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:55:02,474 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:55:02,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:55:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:02,506 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 13:55:02,507 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 [2022-11-23 13:55:02,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:02,518 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 [2022-11-23 13:55:02,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:02,537 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 [2022-11-23 13:55:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:02,595 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 13:55:02,596 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 [2022-11-23 13:55:02,634 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 [2022-11-23 13:55:02,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:02,692 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 [2022-11-23 13:55:02,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:02,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:55:02,783 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 [2022-11-23 13:55:02,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:02,860 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 13:55:02,861 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 [2022-11-23 13:55:02,887 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 [2022-11-23 13:55:02,897 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 [2022-11-23 13:55:03,016 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-23 13:55:03,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:55:48,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1136#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 4 |ULTIMATE.start_main_~i~2#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)) (exists ((v_avg_~ret~0_BEFORE_RETURN_17 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 5) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 5)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 5) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 5)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 5) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 5)) 4294967296) (- 4294967296))))) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#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 [2022-11-23 13:55:48,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:55:48,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:55:48,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2022-11-23 13:55:48,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018975567] [2022-11-23 13:55:48,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:55:48,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 13:55:48,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:55:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 13:55:48,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=364, Unknown=12, NotChecked=0, Total=462 [2022-11-23 13:55:48,207 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:55:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:48,252 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-11-23 13:55:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:55:48,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2022-11-23 13:55:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:48,253 INFO L225 Difference]: With dead ends: 43 [2022-11-23 13:55:48,253 INFO L226 Difference]: Without dead ends: 26 [2022-11-23 13:55:48,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=86, Invalid=364, Unknown=12, NotChecked=0, Total=462 [2022-11-23 13:55:48,255 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:48,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:55:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-23 13:55:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-23 13:55:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2022-11-23 13:55:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-23 13:55:48,260 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 37 [2022-11-23 13:55:48,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:48,260 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-23 13:55:48,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:55:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-23 13:55:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 13:55:48,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:48,262 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:55:48,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:55:48,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:48,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:55:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash -398705584, now seen corresponding path program 4 times [2022-11-23 13:55:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:55:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854639804] [2022-11-23 13:55:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:48,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:55:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-23 13:55:48,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:55:48,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854639804] [2022-11-23 13:55:48,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854639804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:55:48,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631921531] [2022-11-23 13:55:48,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 13:55:48,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:48,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:55:48,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:55:48,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:55:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:55:48,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-23 13:55:48,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-23 13:55:48,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631921531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:48,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152439551] [2022-11-23 13:55:48,822 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 13:55:48,824 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:55:48,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:55:48,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:55:48,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:55:48,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:48,856 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 13:55:48,857 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 [2022-11-23 13:55:48,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:48,882 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 13:55:48,886 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 [2022-11-23 13:55:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:48,906 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 [2022-11-23 13:55:48,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:48,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:48,960 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 13:55:48,961 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 [2022-11-23 13:55:48,997 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 [2022-11-23 13:55:49,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:49,063 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 [2022-11-23 13:55:49,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:49,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:55:49,185 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 32 treesize of output 27 [2022-11-23 13:55:49,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:55:49,224 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 13:55:49,225 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 [2022-11-23 13:55:49,248 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 [2022-11-23 13:55:49,259 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 [2022-11-23 13:55:49,366 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-23 13:55:49,390 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:56:34,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1512#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~i~2#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)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (exists ((v_avg_~ret~0_BEFORE_RETURN_23 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_23 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_23 5) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_23 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_23 5)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_23 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_23 5) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_23 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_23 5)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_23 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_23 5) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_23 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_23 5)) 4294967296) (- 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:56:34,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:56:34,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:56:34,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 8 [2022-11-23 13:56:34,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147538164] [2022-11-23 13:56:34,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:56:34,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:56:34,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:56:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=320, Unknown=12, NotChecked=0, Total=420 [2022-11-23 13:56:34,506 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2022-11-23 13:56:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:34,535 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-11-23 13:56:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:56:34,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 41 [2022-11-23 13:56:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:34,536 INFO L225 Difference]: With dead ends: 47 [2022-11-23 13:56:34,536 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 13:56:34,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=88, Invalid=320, Unknown=12, NotChecked=0, Total=420 [2022-11-23 13:56:34,537 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:34,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:56:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 13:56:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-23 13:56:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2022-11-23 13:56:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-23 13:56:34,543 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 41 [2022-11-23 13:56:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:34,543 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-23 13:56:34,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2022-11-23 13:56:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-23 13:56:34,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 13:56:34,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:34,545 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:34,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:34,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:34,750 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:56:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash -80416309, now seen corresponding path program 5 times [2022-11-23 13:56:34,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:34,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093471375] [2022-11-23 13:56:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:34,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-23 13:56:34,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:34,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093471375] [2022-11-23 13:56:34,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093471375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:34,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958282882] [2022-11-23 13:56:34,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:56:34,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:34,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:34,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:56:34,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 13:56:34,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 13:56:34,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:56:34,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 13:56:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-23 13:56:35,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-23 13:56:35,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958282882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:35,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215981610] [2022-11-23 13:56:35,046 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 13:56:35,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:56:35,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:56:35,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:56:35,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:56:35,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:35,077 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 13:56:35,077 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 [2022-11-23 13:56:35,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:35,088 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 [2022-11-23 13:56:35,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:35,104 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 26 treesize of output 28 [2022-11-23 13:56:35,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:35,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:35,187 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 13:56:35,187 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 [2022-11-23 13:56:35,256 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 [2022-11-23 13:56:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:35,302 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 [2022-11-23 13:56:35,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:35,407 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 [2022-11-23 13:56:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:35,460 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-23 13:56:35,461 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 [2022-11-23 13:56:35,506 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 [2022-11-23 13:56:35,517 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 [2022-11-23 13:56:35,616 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-23 13:56:35,640 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:57:20,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1903#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~i~2#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)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#1|) (exists ((v_avg_~ret~0_BEFORE_RETURN_29 Int)) (= (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_29 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_29 5) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_29 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_29 5)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_29 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_29 5) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_29 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_29 5)) 4294967296) (+ (- 4294967296) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_29 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_29 5) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_29 5) 1) (div v_avg_~ret~0_BEFORE_RETURN_29 5)) 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:57:20,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:57:20,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:57:20,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-23 13:57:20,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038963566] [2022-11-23 13:57:20,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:20,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:57:20,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:57:20,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-23 13:57:20,642 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-23 13:57:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:20,686 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-11-23 13:57:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:57:20,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 42 [2022-11-23 13:57:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:20,687 INFO L225 Difference]: With dead ends: 42 [2022-11-23 13:57:20,687 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 13:57:20,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-23 13:57:20,688 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:20,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:57:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 13:57:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-23 13:57:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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) [2022-11-23 13:57:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-23 13:57:20,698 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 42 [2022-11-23 13:57:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:20,700 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-23 13:57:20,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-23 13:57:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-23 13:57:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 13:57:20,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:20,704 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:20,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:20,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 13:57:20,910 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:57:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:20,911 INFO L85 PathProgramCache]: Analyzing trace with hash -905435637, now seen corresponding path program 6 times [2022-11-23 13:57:20,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:20,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997288560] [2022-11-23 13:57:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:20,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:06,784 WARN L233 SmtUtils]: Spent 9.23s on a formula simplification. DAG size of input: 131 DAG size of output: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:58:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 170 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:58:43,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:43,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997288560] [2022-11-23 13:58:43,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997288560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:43,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977577799] [2022-11-23 13:58:43,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:58:43,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:43,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:43,078 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:43,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62076f41-66af-4299-aaf9-46163372e1f2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 13:58:43,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:58:43,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:58:43,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 165 conjunts are in the unsatisfiable core [2022-11-23 13:58:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:43,886 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 [2022-11-23 13:58:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:59:27,240 WARN L233 SmtUtils]: Spent 37.81s on a formula simplification. DAG size of input: 1494 DAG size of output: 495 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 13:59:27,242 INFO L321 Elim1Store]: treesize reduction 4300, result has 25.7 percent of original size [2022-11-23 13:59:27,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 32 select indices, 32 select index equivalence classes, 1 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 526 case distinctions, treesize of input 867 treesize of output 1787