./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:45:13,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:45:13,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:45:13,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:45:13,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:45:13,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:45:13,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:45:13,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:45:13,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:45:13,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:45:13,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:45:13,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:45:13,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:45:13,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:45:13,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:45:13,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:45:13,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:45:13,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:45:13,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:45:13,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:45:13,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:45:13,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:45:13,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:45:13,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:45:13,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:45:13,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:45:13,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:45:13,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:45:13,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:45:13,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:45:13,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:45:13,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:45:13,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:45:13,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:45:13,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:45:13,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:45:13,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:45:13,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:45:13,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:45:13,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:45:13,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:45:13,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:45:13,224 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:45:13,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:45:13,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:45:13,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:45:13,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:45:13,226 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:45:13,226 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:45:13,226 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:45:13,227 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:45:13,227 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:45:13,227 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:45:13,227 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:45:13,228 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:45:13,228 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:45:13,228 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:45:13,228 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:45:13,228 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:45:13,229 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:45:13,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:45:13,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:45:13,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:45:13,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:45:13,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:45:13,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:45:13,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:45:13,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:45:13,231 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:45:13,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:45:13,231 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:45:13,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:45:13,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:45:13,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:45:13,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:45:13,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:45:13,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:45:13,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:45:13,233 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:45:13,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:45:13,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:45:13,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:45:13,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:45:13,234 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2021-11-25 18:45:13,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:45:13,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:45:13,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:45:13,573 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:45:13,573 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:45:13,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2021-11-25 18:45:13,662 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data/c4bd45be6/cc9ce82003f74bc9a022dcbfdce7bf56/FLAG93d8a0d30 [2021-11-25 18:45:14,193 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:45:14,193 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2021-11-25 18:45:14,211 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data/c4bd45be6/cc9ce82003f74bc9a022dcbfdce7bf56/FLAG93d8a0d30 [2021-11-25 18:45:14,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data/c4bd45be6/cc9ce82003f74bc9a022dcbfdce7bf56 [2021-11-25 18:45:14,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:45:14,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:45:14,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:45:14,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:45:14,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:45:14,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d184c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14, skipping insertion in model container [2021-11-25 18:45:14,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:45:14,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:45:14,789 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2021-11-25 18:45:14,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:45:14,842 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:45:14,854 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2021-11-25 18:45:14,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:45:14,895 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:45:14,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14 WrapperNode [2021-11-25 18:45:14,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:45:14,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:45:14,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:45:14,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:45:14,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,931 INFO L137 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2021-11-25 18:45:14,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:45:14,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:45:14,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:45:14,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:45:14,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:45:14,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:45:14,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:45:14,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:45:14,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (1/1) ... [2021-11-25 18:45:14,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:45:14,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:45:14,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:45:15,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:45:15,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:45:15,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:45:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 18:45:15,033 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 18:45:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:45:15,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:45:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-25 18:45:15,033 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-25 18:45:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:45:15,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:45:15,095 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:45:15,097 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:45:15,323 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:45:15,371 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:45:15,372 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:45:15,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:45:15 BoogieIcfgContainer [2021-11-25 18:45:15,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:45:15,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:45:15,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:45:15,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:45:15,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:45:14" (1/3) ... [2021-11-25 18:45:15,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206512ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:45:15, skipping insertion in model container [2021-11-25 18:45:15,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:14" (2/3) ... [2021-11-25 18:45:15,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206512ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:45:15, skipping insertion in model container [2021-11-25 18:45:15,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:45:15" (3/3) ... [2021-11-25 18:45:15,383 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2021-11-25 18:45:15,388 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:45:15,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:45:15,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:45:15,443 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:45:15,444 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:45:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:45:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:45:15,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:15,471 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:15,471 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash -769531522, now seen corresponding path program 1 times [2021-11-25 18:45:15,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:45:15,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827703090] [2021-11-25 18:45:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:15,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:45:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:45:15,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:45:15,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827703090] [2021-11-25 18:45:15,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827703090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:45:15,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:45:15,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:45:15,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315890413] [2021-11-25 18:45:15,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:45:15,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:45:15,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:45:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:45:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:45:15,984 INFO L87 Difference]: Start difference. First operand has 45 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:45:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:16,166 INFO L93 Difference]: Finished difference Result 112 states and 171 transitions. [2021-11-25 18:45:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:45:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-11-25 18:45:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:16,179 INFO L225 Difference]: With dead ends: 112 [2021-11-25 18:45:16,179 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 18:45:16,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:45:16,188 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 16 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:16,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 383 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:45:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 18:45:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2021-11-25 18:45:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 12 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-25 18:45:16,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2021-11-25 18:45:16,239 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 26 [2021-11-25 18:45:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:16,240 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2021-11-25 18:45:16,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:45:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2021-11-25 18:45:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:45:16,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:16,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:16,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:45:16,244 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash 498972275, now seen corresponding path program 1 times [2021-11-25 18:45:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:45:16,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078658902] [2021-11-25 18:45:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:16,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:45:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:45:16,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:45:16,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078658902] [2021-11-25 18:45:16,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078658902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:45:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201121443] [2021-11-25 18:45:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:16,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:45:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:45:16,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:45:16,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:45:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:16,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 18:45:16,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:45:16,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:45:17,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201121443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:45:17,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932528463] [2021-11-25 18:45:17,215 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 18:45:17,215 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:45:17,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:45:17,230 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:45:17,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:45:17,964 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 17 for LOIs [2021-11-25 18:45:19,083 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2021-11-25 18:45:20,386 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2021-11-25 18:45:20,540 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:45:35,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '488#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 Int) (aux_div_v_addflt_~b_BEFORE_CALL_1_42 Int) (aux_mod_v_addflt_~a_BEFORE_CALL_1_42 Int) (aux_div_v_addflt_~a_BEFORE_CALL_1_42 Int) (aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 Int)) (and (<= 0 aux_mod_v_addflt_~a_BEFORE_CALL_1_42) (<= 0 (+ aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* 4294967296 aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53))) (or (and (= (+ (* 4294967296 aux_div_v_addflt_~a_BEFORE_CALL_1_42) aux_mod_v_addflt_~a_BEFORE_CALL_1_42) 0) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))) (= |__VERIFIER_assert_#in~cond| (ite (<= (ite (<= (mod (div (+ (* aux_div_v_addflt_~b_BEFORE_CALL_1_42 4294967296) aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 4294967296)) 16777216) 4294967296) 2147483647) (mod (div (+ (* aux_div_v_addflt_~b_BEFORE_CALL_1_42 4294967296) aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 4294967296)) 16777216) 4294967296) (+ (mod (div (+ (* aux_div_v_addflt_~b_BEFORE_CALL_1_42 4294967296) aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 4294967296)) 16777216) 4294967296) (- 4294967296))) (ite (<= (mod (div (+ aux_mod_v_addflt_~a_BEFORE_CALL_1_42 (* aux_div_v_addflt_~a_BEFORE_CALL_1_42 4294967296)) 16777216) 4294967296) 2147483647) (mod (div (+ aux_mod_v_addflt_~a_BEFORE_CALL_1_42 (* aux_div_v_addflt_~a_BEFORE_CALL_1_42 4294967296)) 16777216) 4294967296) (+ (mod (div (+ aux_mod_v_addflt_~a_BEFORE_CALL_1_42 (* aux_div_v_addflt_~a_BEFORE_CALL_1_42 4294967296)) 16777216) 4294967296) (- 4294967296)))) 1 0)) (< (+ aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* 4294967296 aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53)) 4294967296) (<= aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 aux_mod_v_addflt_~a_BEFORE_CALL_1_42) (< aux_mod_v_addflt_~a_BEFORE_CALL_1_42 4294967296) (not (= (+ aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 (* 4294967296 aux_div_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53)) 0)) (<= 0 aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53) (< aux_mod_aux_mod_v_addflt_~b_BEFORE_CALL_1_42_53 4294967296))) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:45:35,331 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:45:35,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:45:35,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 15 [2021-11-25 18:45:35,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549184147] [2021-11-25 18:45:35,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:45:35,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:45:35,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:45:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:45:35,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1001, Unknown=2, NotChecked=0, Total=1122 [2021-11-25 18:45:35,336 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:45:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:35,735 INFO L93 Difference]: Finished difference Result 138 states and 191 transitions. [2021-11-25 18:45:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:45:35,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2021-11-25 18:45:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:35,739 INFO L225 Difference]: With dead ends: 138 [2021-11-25 18:45:35,739 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 18:45:35,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=169, Invalid=1469, Unknown=2, NotChecked=0, Total=1640 [2021-11-25 18:45:35,743 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 31 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:35,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 425 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:45:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 18:45:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-11-25 18:45:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-25 18:45:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2021-11-25 18:45:35,761 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 30 [2021-11-25 18:45:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:35,761 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2021-11-25 18:45:35,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:45:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2021-11-25 18:45:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:45:35,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:35,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:35,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:35,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:45:35,979 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1785742131, now seen corresponding path program 2 times [2021-11-25 18:45:35,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:45:35,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258366998] [2021-11-25 18:45:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:35,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:45:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:45:36,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:45:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258366998] [2021-11-25 18:45:36,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258366998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:45:36,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:45:36,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:45:36,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668315370] [2021-11-25 18:45:36,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:45:36,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:45:36,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:45:36,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:45:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:45:36,105 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:45:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:36,200 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2021-11-25 18:45:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:45:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-25 18:45:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:36,202 INFO L225 Difference]: With dead ends: 102 [2021-11-25 18:45:36,203 INFO L226 Difference]: Without dead ends: 79 [2021-11-25 18:45:36,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:45:36,205 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 8 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:36,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 356 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:45:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-25 18:45:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-11-25 18:45:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-11-25 18:45:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2021-11-25 18:45:36,231 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 30 [2021-11-25 18:45:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:36,232 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2021-11-25 18:45:36,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:45:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2021-11-25 18:45:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 18:45:36,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:36,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:36,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:45:36,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:36,241 INFO L85 PathProgramCache]: Analyzing trace with hash 965646607, now seen corresponding path program 1 times [2021-11-25 18:45:36,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:45:36,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750457676] [2021-11-25 18:45:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:36,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:45:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:45:36,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:45:36,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750457676] [2021-11-25 18:45:36,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750457676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:45:36,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:45:36,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-25 18:45:36,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582568418] [2021-11-25 18:45:36,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:45:36,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:45:36,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:45:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:45:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:45:36,752 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:45:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:37,026 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2021-11-25 18:45:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:45:37,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2021-11-25 18:45:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:37,029 INFO L225 Difference]: With dead ends: 85 [2021-11-25 18:45:37,029 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 18:45:37,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:45:37,031 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:37,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 525 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:45:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 18:45:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-11-25 18:45:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 41 states have internal predecessors, (50), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-25 18:45:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2021-11-25 18:45:37,042 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 35 [2021-11-25 18:45:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:37,042 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2021-11-25 18:45:37,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:45:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2021-11-25 18:45:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:45:37,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:37,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:37,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:45:37,045 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:37,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1072313768, now seen corresponding path program 3 times [2021-11-25 18:45:37,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:45:37,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581807326] [2021-11-25 18:45:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:37,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:45:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:45:37,074 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:45:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:45:37,128 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:45:37,128 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:45:37,129 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:45:37,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:45:37,135 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-11-25 18:45:37,138 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:45:37,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:45:37 BoogieIcfgContainer [2021-11-25 18:45:37,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:45:37,188 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:45:37,188 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:45:37,188 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:45:37,189 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:45:15" (3/4) ... [2021-11-25 18:45:37,192 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 18:45:37,192 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:45:37,193 INFO L158 Benchmark]: Toolchain (without parser) took 22633.03ms. Allocated memory was 81.8MB in the beginning and 184.5MB in the end (delta: 102.8MB). Free memory was 46.9MB in the beginning and 59.9MB in the end (delta: -13.0MB). Peak memory consumption was 89.3MB. Max. memory is 16.1GB. [2021-11-25 18:45:37,193 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 25.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:45:37,194 INFO L158 Benchmark]: CACSL2BoogieTranslator took 334.98ms. Allocated memory was 81.8MB in the beginning and 102.8MB in the end (delta: 21.0MB). Free memory was 46.7MB in the beginning and 76.7MB in the end (delta: -30.0MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2021-11-25 18:45:37,195 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.41ms. Allocated memory is still 102.8MB. Free memory was 76.7MB in the beginning and 75.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:45:37,195 INFO L158 Benchmark]: Boogie Preprocessor took 28.93ms. Allocated memory is still 102.8MB. Free memory was 75.1MB in the beginning and 73.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:45:37,195 INFO L158 Benchmark]: RCFGBuilder took 412.54ms. Allocated memory is still 102.8MB. Free memory was 73.9MB in the beginning and 59.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 18:45:37,196 INFO L158 Benchmark]: TraceAbstraction took 21811.63ms. Allocated memory was 102.8MB in the beginning and 184.5MB in the end (delta: 81.8MB). Free memory was 59.5MB in the beginning and 59.9MB in the end (delta: -393.8kB). Peak memory consumption was 81.7MB. Max. memory is 16.1GB. [2021-11-25 18:45:37,196 INFO L158 Benchmark]: Witness Printer took 4.17ms. Allocated memory is still 184.5MB. Free memory is still 59.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:45:37,199 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 81.8MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 25.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 334.98ms. Allocated memory was 81.8MB in the beginning and 102.8MB in the end (delta: 21.0MB). Free memory was 46.7MB in the beginning and 76.7MB in the end (delta: -30.0MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.41ms. Allocated memory is still 102.8MB. Free memory was 76.7MB in the beginning and 75.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.93ms. Allocated memory is still 102.8MB. Free memory was 75.1MB in the beginning and 73.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 412.54ms. Allocated memory is still 102.8MB. Free memory was 73.9MB in the beginning and 59.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 21811.63ms. Allocated memory was 102.8MB in the beginning and 184.5MB in the end (delta: 81.8MB). Free memory was 59.5MB in the beginning and 59.9MB in the end (delta: -393.8kB). Peak memory consumption was 81.7MB. Max. memory is 16.1GB. * Witness Printer took 4.17ms. Allocated memory is still 184.5MB. Free memory is still 59.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 108. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add1 ; [L233] unsigned int r_add2 ; [L234] unsigned int zero ; [L235] int tmp ; [L236] int tmp___0 ; [L237] int __retres14 ; VAL [ea=0, eb=0] [L241] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L241] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=0, eb=0] [L241] zero = base2flt(0, 0) [L242] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=16777216, e=0, res=16777216] [L80] return (__retres4); [L242] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-72057594021150720, ea=0, eb=0, ma=16777216, zero=0] [L242] a = base2flt(ma, ea) [L243] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=1, e=0, res=1] [L80] return (__retres4); [L243] RET, EXPR base2flt(mb, eb) VAL [a=16777216, base2flt(mb, eb)=-108086395351859199, ea=0, eb=0, ma=16777216, mb=16777216, zero=0] [L243] b = base2flt(mb, eb) [L244] CALL addflt(a, b) VAL [\old(a)=16777216, \old(b)=1] [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; [L94] COND FALSE !(a < b) VAL [\old(a)=16777216, \old(b)=1, a=16777216, b=1, tmp=16777216] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=16777216, \old(b)=1, a=16777216, b=1, ea=-127, eb=2147483264, tmp=16777216] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.7s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 100 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 77 mSDsluCounter, 1689 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1582 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 667 IncrementalHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 195 mSDtfsCounter, 667 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 15.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=2, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 42 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 453 SizeOfPredicates, 8 NumberOfNonLiveVariables, 112 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 64/76 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 18:45:37,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:45:39,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:45:39,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:45:39,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:45:39,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:45:39,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:45:39,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:45:39,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:45:39,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:45:39,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:45:39,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:45:39,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:45:39,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:45:39,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:45:39,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:45:39,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:45:39,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:45:39,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:45:39,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:45:39,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:45:39,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:45:39,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:45:39,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:45:39,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:45:39,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:45:39,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:45:39,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:45:39,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:45:39,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:45:39,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:45:39,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:45:39,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:45:39,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:45:39,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:45:39,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:45:39,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:45:39,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:45:39,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:45:39,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:45:39,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:45:39,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:45:39,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 18:45:40,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:45:40,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:45:40,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:45:40,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:45:40,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:45:40,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:45:40,016 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:45:40,016 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:45:40,016 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:45:40,016 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:45:40,018 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:45:40,018 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:45:40,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:45:40,020 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:45:40,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:45:40,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:45:40,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:45:40,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:45:40,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:45:40,021 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:45:40,022 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:45:40,022 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:45:40,022 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:45:40,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:45:40,022 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:45:40,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:45:40,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:45:40,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:45:40,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:45:40,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:45:40,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:45:40,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:45:40,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:45:40,025 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:45:40,025 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:45:40,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:45:40,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:45:40,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:45:40,027 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2021-11-25 18:45:40,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:45:40,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:45:40,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:45:40,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:45:40,475 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:45:40,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2021-11-25 18:45:40,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data/8ecf00578/882d2e9ed0994cd2be413588ba6f2594/FLAGb3dbbf0c1 [2021-11-25 18:45:41,078 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:45:41,079 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2021-11-25 18:45:41,092 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data/8ecf00578/882d2e9ed0994cd2be413588ba6f2594/FLAGb3dbbf0c1 [2021-11-25 18:45:41,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/data/8ecf00578/882d2e9ed0994cd2be413588ba6f2594 [2021-11-25 18:45:41,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:45:41,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:45:41,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:45:41,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:45:41,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:45:41,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a976fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41, skipping insertion in model container [2021-11-25 18:45:41,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:45:41,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:45:41,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2021-11-25 18:45:41,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:45:41,853 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:45:41,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2021-11-25 18:45:41,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:45:41,905 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:45:41,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41 WrapperNode [2021-11-25 18:45:41,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:45:41,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:45:41,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:45:41,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:45:41,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,946 INFO L137 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2021-11-25 18:45:41,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:45:41,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:45:41,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:45:41,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:45:41,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:45:41,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:45:41,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:45:41,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:45:41,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (1/1) ... [2021-11-25 18:45:41,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:45:42,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:45:42,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:45:42,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:45:42,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:45:42,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:45:42,082 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 18:45:42,082 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 18:45:42,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:45:42,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:45:42,083 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-25 18:45:42,083 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-25 18:45:42,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:45:42,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:45:42,215 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:45:42,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:45:42,522 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:45:42,529 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:45:42,529 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:45:42,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:45:42 BoogieIcfgContainer [2021-11-25 18:45:42,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:45:42,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:45:42,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:45:42,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:45:42,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:45:41" (1/3) ... [2021-11-25 18:45:42,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd401c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:45:42, skipping insertion in model container [2021-11-25 18:45:42,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:45:41" (2/3) ... [2021-11-25 18:45:42,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd401c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:45:42, skipping insertion in model container [2021-11-25 18:45:42,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:45:42" (3/3) ... [2021-11-25 18:45:42,540 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2021-11-25 18:45:42,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:45:42,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:45:42,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:45:42,601 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:45:42,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:45:42,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:45:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 18:45:42,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:42,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:42,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:42,634 INFO L85 PathProgramCache]: Analyzing trace with hash 173410466, now seen corresponding path program 1 times [2021-11-25 18:45:42,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:45:42,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099635304] [2021-11-25 18:45:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:42,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:45:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:45:42,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:45:42,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:45:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:45:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:43,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:45:43,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:45:43,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099635304] [2021-11-25 18:45:43,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099635304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:45:43,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:45:43,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:45:43,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495887271] [2021-11-25 18:45:43,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:45:43,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:45:43,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:45:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:45:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:45:43,127 INFO L87 Difference]: Start difference. First operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:45:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:43,359 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2021-11-25 18:45:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:45:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-11-25 18:45:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:43,374 INFO L225 Difference]: With dead ends: 130 [2021-11-25 18:45:43,375 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 18:45:43,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:45:43,383 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 23 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:43,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 472 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:45:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 18:45:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2021-11-25 18:45:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 47 states have internal predecessors, (59), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-25 18:45:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2021-11-25 18:45:43,452 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 31 [2021-11-25 18:45:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:43,453 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2021-11-25 18:45:43,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:45:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2021-11-25 18:45:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 18:45:43,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:43,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:43,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:43,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:45:43,662 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1707598935, now seen corresponding path program 1 times [2021-11-25 18:45:43,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:45:43,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882068890] [2021-11-25 18:45:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:43,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:45:43,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:45:43,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:45:43,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:45:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:43,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:45:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:43,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:44,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:45:44,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882068890] [2021-11-25 18:45:44,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882068890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:45:44,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [905961715] [2021-11-25 18:45:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:44,098 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:45:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:45:44,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:45:44,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-25 18:45:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:44,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:45:44,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:44,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:44,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [905961715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:45:44,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043490904] [2021-11-25 18:45:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:44,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:45:44,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:45:44,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:45:44,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:45:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:44,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:45:44,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:44,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:44,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043490904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:45:44,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:45:44,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2021-11-25 18:45:44,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528332339] [2021-11-25 18:45:44,659 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:45:44,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:45:44,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:45:44,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:45:44,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:45:44,662 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:45:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:44,841 INFO L93 Difference]: Finished difference Result 121 states and 161 transitions. [2021-11-25 18:45:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:45:44,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-25 18:45:44,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:44,844 INFO L225 Difference]: With dead ends: 121 [2021-11-25 18:45:44,845 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 18:45:44,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:45:44,847 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 26 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:44,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 508 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:45:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 18:45:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2021-11-25 18:45:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 54 states have internal predecessors, (67), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-25 18:45:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-11-25 18:45:44,874 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 35 [2021-11-25 18:45:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:44,875 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-11-25 18:45:44,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:45:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-11-25 18:45:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:45:44,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:44,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:44,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:45,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:45,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-25 18:45:45,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:45:45,512 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1508244029, now seen corresponding path program 1 times [2021-11-25 18:45:45,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:45:45,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741448361] [2021-11-25 18:45:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:45,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:45:45,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:45:45,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:45:45,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:45:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:45,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:45:45,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:45,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:45,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:45:45,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741448361] [2021-11-25 18:45:45,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741448361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:45:45,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1211185890] [2021-11-25 18:45:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:45,807 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:45:45,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:45:45,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:45:45,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-25 18:45:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:45,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:45:45,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:45:46,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:45:46,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1211185890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:45:46,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:45:46,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 12 [2021-11-25 18:45:46,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213977660] [2021-11-25 18:45:46,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:45:46,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:45:46,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:45:46,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:45:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:45:46,053 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:45:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:46,192 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2021-11-25 18:45:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:45:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-25 18:45:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:46,196 INFO L225 Difference]: With dead ends: 114 [2021-11-25 18:45:46,197 INFO L226 Difference]: Without dead ends: 91 [2021-11-25 18:45:46,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:45:46,202 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 19 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:46,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 531 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:45:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-25 18:45:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2021-11-25 18:45:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 60 states have internal predecessors, (74), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-25 18:45:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2021-11-25 18:45:46,231 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 39 [2021-11-25 18:45:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:46,232 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2021-11-25 18:45:46,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:45:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2021-11-25 18:45:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:45:46,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:46,235 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:46,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:46,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:46,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:45:46,646 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash -54729342, now seen corresponding path program 2 times [2021-11-25 18:45:46,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:45:46,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079869614] [2021-11-25 18:45:46,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:45:46,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:45:46,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:45:46,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:45:46,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:45:46,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-25 18:45:46,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:45:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:45:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 18:45:46,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:45:46,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:45:46,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079869614] [2021-11-25 18:45:46,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079869614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:45:46,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:45:46,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:45:46,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307191357] [2021-11-25 18:45:46,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:45:46,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:45:46,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:45:46,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:45:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:45:46,954 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:45:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:47,028 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2021-11-25 18:45:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:45:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-25 18:45:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:47,031 INFO L225 Difference]: With dead ends: 98 [2021-11-25 18:45:47,032 INFO L226 Difference]: Without dead ends: 96 [2021-11-25 18:45:47,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:45:47,033 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 9 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:47,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 333 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-25 18:45:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-25 18:45:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2021-11-25 18:45:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 65 states have internal predecessors, (79), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2021-11-25 18:45:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-11-25 18:45:47,047 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 39 [2021-11-25 18:45:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:47,048 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-11-25 18:45:47,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:45:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-11-25 18:45:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:45:47,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:47,050 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:47,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:47,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:45:47,261 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2528960, now seen corresponding path program 1 times [2021-11-25 18:45:47,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:45:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771656334] [2021-11-25 18:45:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:47,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:45:47,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:45:47,263 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:45:47,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:45:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:47,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:45:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 18:45:47,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:45:47,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:45:47,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771656334] [2021-11-25 18:45:47,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771656334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:45:47,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:45:47,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:45:47,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918781009] [2021-11-25 18:45:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:45:47,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:45:47,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:45:47,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:45:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:45:47,499 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:45:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:47,571 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2021-11-25 18:45:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:45:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-25 18:45:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:47,575 INFO L225 Difference]: With dead ends: 94 [2021-11-25 18:45:47,575 INFO L226 Difference]: Without dead ends: 92 [2021-11-25 18:45:47,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:45:47,576 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:47,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 311 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-25 18:45:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-25 18:45:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-11-25 18:45:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 63 states have internal predecessors, (77), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-25 18:45:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2021-11-25 18:45:47,597 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 39 [2021-11-25 18:45:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:47,601 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2021-11-25 18:45:47,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:45:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2021-11-25 18:45:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:45:47,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:47,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:47,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:47,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:45:47,824 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1136903568, now seen corresponding path program 1 times [2021-11-25 18:45:47,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:45:47,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468292909] [2021-11-25 18:45:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:47,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:45:47,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:45:47,831 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:45:47,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 18:45:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:47,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:45:47,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:45:47,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:45:48,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:45:48,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468292909] [2021-11-25 18:45:48,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468292909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:45:48,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1709652061] [2021-11-25 18:45:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:48,138 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:45:48,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:45:48,140 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:45:48,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-25 18:45:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:48,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:45:48,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:45:48,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:45:48,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1709652061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:45:48,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966274720] [2021-11-25 18:45:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:48,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:45:48,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:45:48,441 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:45:48,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:45:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:48,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:45:48,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:45:48,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:45:48,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966274720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:45:48,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:45:48,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2021-11-25 18:45:48,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049214842] [2021-11-25 18:45:48,723 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:45:48,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:45:48,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:45:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:45:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:45:48,725 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:45:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:48,897 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2021-11-25 18:45:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:45:48,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-11-25 18:45:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:48,900 INFO L225 Difference]: With dead ends: 129 [2021-11-25 18:45:48,900 INFO L226 Difference]: Without dead ends: 118 [2021-11-25 18:45:48,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:45:48,901 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 42 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:48,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 513 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:45:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-25 18:45:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2021-11-25 18:45:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 74 states have internal predecessors, (87), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2021-11-25 18:45:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2021-11-25 18:45:48,919 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 44 [2021-11-25 18:45:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:48,920 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2021-11-25 18:45:48,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:45:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2021-11-25 18:45:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:45:48,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:48,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:48,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:49,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-25 18:45:49,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:49,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:45:49,533 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:49,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1837968146, now seen corresponding path program 1 times [2021-11-25 18:45:49,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:45:49,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18022897] [2021-11-25 18:45:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:49,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:45:49,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:45:49,535 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:45:49,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 18:45:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:45:49,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:45:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:45:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:45:49,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:45:49,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:45:49,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18022897] [2021-11-25 18:45:49,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18022897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:45:49,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:45:49,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 18:45:49,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846050882] [2021-11-25 18:45:49,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:45:49,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:45:49,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:45:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:45:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:45:49,758 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:45:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:45:50,002 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2021-11-25 18:45:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:45:50,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-11-25 18:45:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:45:50,005 INFO L225 Difference]: With dead ends: 133 [2021-11-25 18:45:50,005 INFO L226 Difference]: Without dead ends: 126 [2021-11-25 18:45:50,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:45:50,007 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 33 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:45:50,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 684 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:45:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-25 18:45:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2021-11-25 18:45:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 75 states have internal predecessors, (89), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2021-11-25 18:45:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2021-11-25 18:45:50,033 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 44 [2021-11-25 18:45:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:45:50,034 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2021-11-25 18:45:50,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:45:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2021-11-25 18:45:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:45:50,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:45:50,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:50,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:50,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:45:50,249 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:45:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:45:50,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1849173563, now seen corresponding path program 1 times [2021-11-25 18:45:50,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:45:50,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777012982] [2021-11-25 18:45:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:45:50,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:45:50,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:45:50,251 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:45:50,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 18:45:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:45:50,293 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:45:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:45:50,379 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-25 18:45:50,380 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:45:50,396 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:45:50,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:45:50,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:45:50,600 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:45:50,603 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:45:50,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:45:50 BoogieIcfgContainer [2021-11-25 18:45:50,640 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:45:50,641 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:45:50,641 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:45:50,641 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:45:50,642 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:45:42" (3/4) ... [2021-11-25 18:45:50,644 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 18:45:50,698 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:45:50,698 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:45:50,699 INFO L158 Benchmark]: Toolchain (without parser) took 9301.81ms. Allocated memory was 69.2MB in the beginning and 94.4MB in the end (delta: 25.2MB). Free memory was 50.4MB in the beginning and 39.8MB in the end (delta: 10.6MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. [2021-11-25 18:45:50,699 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 69.2MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:45:50,700 INFO L158 Benchmark]: CACSL2BoogieTranslator took 505.43ms. Allocated memory is still 69.2MB. Free memory was 50.2MB in the beginning and 49.8MB in the end (delta: 382.3kB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2021-11-25 18:45:50,700 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.87ms. Allocated memory is still 69.2MB. Free memory was 49.8MB in the beginning and 48.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:45:50,700 INFO L158 Benchmark]: Boogie Preprocessor took 37.31ms. Allocated memory is still 69.2MB. Free memory was 48.1MB in the beginning and 46.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:45:50,701 INFO L158 Benchmark]: RCFGBuilder took 546.37ms. Allocated memory is still 69.2MB. Free memory was 46.6MB in the beginning and 34.6MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:45:50,701 INFO L158 Benchmark]: TraceAbstraction took 8106.81ms. Allocated memory was 69.2MB in the beginning and 94.4MB in the end (delta: 25.2MB). Free memory was 34.0MB in the beginning and 43.6MB in the end (delta: -9.6MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2021-11-25 18:45:50,702 INFO L158 Benchmark]: Witness Printer took 57.17ms. Allocated memory is still 94.4MB. Free memory was 43.6MB in the beginning and 39.8MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:45:50,704 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 69.2MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 505.43ms. Allocated memory is still 69.2MB. Free memory was 50.2MB in the beginning and 49.8MB in the end (delta: 382.3kB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.87ms. Allocated memory is still 69.2MB. Free memory was 49.8MB in the beginning and 48.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.31ms. Allocated memory is still 69.2MB. Free memory was 48.1MB in the beginning and 46.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 546.37ms. Allocated memory is still 69.2MB. Free memory was 46.6MB in the beginning and 34.6MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8106.81ms. Allocated memory was 69.2MB in the beginning and 94.4MB in the end (delta: 25.2MB). Free memory was 34.0MB in the beginning and 43.6MB in the end (delta: -9.6MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Witness Printer took 57.17ms. Allocated memory is still 94.4MB. Free memory was 43.6MB in the beginning and 39.8MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add1 ; [L233] unsigned int r_add2 ; [L234] unsigned int zero ; [L235] int tmp ; [L236] int tmp___0 ; [L237] int __retres14 ; [L241] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L241] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L241] zero = base2flt(0, 0) [L242] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L242] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L242] a = base2flt(ma, ea) [L243] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L80] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L243] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L243] b = base2flt(mb, eb) [L244] CALL addflt(a, b) VAL [\old(a)=2147483648, \old(b)=3221225472] [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L115] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.0s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 179 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 161 mSDsluCounter, 3352 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19 IncrementalHoareTripleChecker+Unchecked, 2865 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 536 IncrementalHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 487 mSDtfsCounter, 536 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=7, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 112 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 513 NumberOfCodeBlocks, 495 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 725 ConstructedInterpolants, 2 QuantifiedInterpolants, 1208 SizeOfPredicates, 36 NumberOfNonLiveVariables, 954 ConjunctsInSsa, 97 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 302/344 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-25 18:45:50,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb04b53-487c-4c33-a1dc-14fe29e09688/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE