./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8 --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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8 --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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:15:44,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:15:44,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:15:44,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:15:44,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:15:44,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:15:44,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:15:44,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:15:44,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:15:44,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:15:44,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:15:44,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:15:44,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:15:44,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:15:44,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:15:44,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:15:44,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:15:44,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:15:44,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:15:44,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:15:44,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:15:44,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:15:44,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:15:44,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:15:44,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:15:44,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:15:44,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:15:44,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:15:44,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:15:44,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:15:44,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:15:44,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:15:44,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:15:44,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:15:44,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:15:44,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:15:44,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:15:44,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:15:44,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:15:44,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:15:44,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:15:44,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:15:44,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:15:44,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:15:44,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:15:44,211 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:15:44,211 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:15:44,211 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:15:44,212 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:15:44,212 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:15:44,212 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:15:44,212 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:15:44,213 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:15:44,214 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:15:44,214 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:15:44,214 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:15:44,214 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:15:44,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:15:44,216 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:15:44,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:15:44,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:15:44,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:15:44,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:15:44,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:15:44,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:15:44,217 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:15:44,217 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:15:44,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:15:44,218 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:15:44,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:15:44,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:15:44,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:15:44,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:44,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:15:44,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:15:44,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:15:44,221 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:15:44,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:15:44,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:15:44,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:15:44,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:15:44,223 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_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2021-10-13 07:15:44,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:15:44,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:15:44,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:15:44,516 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:15:44,516 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:15:44,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-13 07:15:44,595 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data/8363abce5/0c021b5814a646a08d700f1ac126a300/FLAG28f40192a [2021-10-13 07:15:45,171 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:15:45,178 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-13 07:15:45,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data/8363abce5/0c021b5814a646a08d700f1ac126a300/FLAG28f40192a [2021-10-13 07:15:45,481 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data/8363abce5/0c021b5814a646a08d700f1ac126a300 [2021-10-13 07:15:45,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:15:45,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:15:45,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:45,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:15:45,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:15:45,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:45,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@785e9080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45, skipping insertion in model container [2021-10-13 07:15:45,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:45,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:15:45,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:15:45,798 WARN L228 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_9c10216a-16ac-4f1e-95cb-3607934a55f8/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-13 07:15:45,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:45,828 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:15:45,880 WARN L228 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_9c10216a-16ac-4f1e-95cb-3607934a55f8/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-13 07:15:45,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:45,896 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:15:45,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45 WrapperNode [2021-10-13 07:15:45,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:45,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:45,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:15:45,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:15:45,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:45,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:45,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:45,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:15:45,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:15:45,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:15:45,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:45,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:45,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:45,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:45,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:45,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:46,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:46,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:15:46,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:15:46,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:15:46,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:15:46,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (1/1) ... [2021-10-13 07:15:46,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:46,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:15:46,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:15:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:15:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:15:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:15:46,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:15:46,204 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 07:15:46,576 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-13 07:15:46,576 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-13 07:15:47,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:15:47,101 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:15:47,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:47 BoogieIcfgContainer [2021-10-13 07:15:47,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:15:47,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:15:47,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:15:47,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:15:47,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:45" (1/3) ... [2021-10-13 07:15:47,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f40a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:47, skipping insertion in model container [2021-10-13 07:15:47,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:45" (2/3) ... [2021-10-13 07:15:47,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f40a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:47, skipping insertion in model container [2021-10-13 07:15:47,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:47" (3/3) ... [2021-10-13 07:15:47,112 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2021-10-13 07:15:47,117 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:15:47,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:15:47,179 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:15:47,187 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, mConcurrency=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 [2021-10-13 07:15:47,187 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:15:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:15:47,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:47,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:47,230 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:47,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1473416293, now seen corresponding path program 1 times [2021-10-13 07:15:47,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:47,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345539235] [2021-10-13 07:15:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:47,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:47,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:47,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345539235] [2021-10-13 07:15:47,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345539235] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:47,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:47,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:15:47,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726877255] [2021-10-13 07:15:47,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:47,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:47,465 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:47,591 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2021-10-13 07:15:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 07:15:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:47,602 INFO L225 Difference]: With dead ends: 169 [2021-10-13 07:15:47,602 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 07:15:47,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 07:15:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-13 07:15:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2021-10-13 07:15:47,642 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2021-10-13 07:15:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:47,642 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2021-10-13 07:15:47,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:47,643 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2021-10-13 07:15:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:15:47,644 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:47,644 INFO L512 BasicCegarLoop]: trace histogram [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, 1] [2021-10-13 07:15:47,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:15:47,645 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:47,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1584510802, now seen corresponding path program 1 times [2021-10-13 07:15:47,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:47,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839693194] [2021-10-13 07:15:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:47,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:47,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:47,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839693194] [2021-10-13 07:15:47,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839693194] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:47,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:47,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:15:47,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760787693] [2021-10-13 07:15:47,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:47,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:47,719 INFO L87 Difference]: Start difference. First operand 83 states and 120 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:47,830 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2021-10-13 07:15:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:47,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 07:15:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:47,832 INFO L225 Difference]: With dead ends: 178 [2021-10-13 07:15:47,832 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 07:15:47,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 07:15:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-13 07:15:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.431578947368421) internal successors, (136), 95 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2021-10-13 07:15:47,844 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2021-10-13 07:15:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:47,845 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2021-10-13 07:15:47,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2021-10-13 07:15:47,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 07:15:47,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:47,847 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 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] [2021-10-13 07:15:47,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:15:47,847 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:47,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:47,848 INFO L82 PathProgramCache]: Analyzing trace with hash -226758766, now seen corresponding path program 1 times [2021-10-13 07:15:47,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:47,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270614678] [2021-10-13 07:15:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:47,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:15:47,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:47,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270614678] [2021-10-13 07:15:47,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270614678] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:47,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:47,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:15:47,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048438761] [2021-10-13 07:15:47,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:47,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:47,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:47,961 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:48,104 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2021-10-13 07:15:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:48,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-13 07:15:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:48,110 INFO L225 Difference]: With dead ends: 206 [2021-10-13 07:15:48,110 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 07:15:48,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 07:15:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-10-13 07:15:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4) internal successors, (154), 110 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2021-10-13 07:15:48,131 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2021-10-13 07:15:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:48,132 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2021-10-13 07:15:48,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2021-10-13 07:15:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 07:15:48,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:48,136 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-13 07:15:48,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:15:48,137 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash -466595364, now seen corresponding path program 1 times [2021-10-13 07:15:48,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:48,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907059495] [2021-10-13 07:15:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:48,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:15:48,315 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:48,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907059495] [2021-10-13 07:15:48,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907059495] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:15:48,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858588309] [2021-10-13 07:15:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:48,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:15:48,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:48,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:15:48,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:15:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:48,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:15:48,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 07:15:48,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 07:15:48,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858588309] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:48,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:15:48,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2021-10-13 07:15:48,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669218249] [2021-10-13 07:15:48,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:15:48,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:15:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:15:48,933 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:49,326 INFO L93 Difference]: Finished difference Result 312 states and 467 transitions. [2021-10-13 07:15:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:15:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-13 07:15:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:49,328 INFO L225 Difference]: With dead ends: 312 [2021-10-13 07:15:49,329 INFO L226 Difference]: Without dead ends: 203 [2021-10-13 07:15:49,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:15:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-13 07:15:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2021-10-13 07:15:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.3783783783783783) internal successors, (255), 185 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 255 transitions. [2021-10-13 07:15:49,359 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 255 transitions. Word has length 52 [2021-10-13 07:15:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:49,360 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 255 transitions. [2021-10-13 07:15:49,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:49,360 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 255 transitions. [2021-10-13 07:15:49,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-13 07:15:49,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:49,362 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-10-13 07:15:49,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:49,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:15:49,584 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:49,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1777131692, now seen corresponding path program 1 times [2021-10-13 07:15:49,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:49,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012965734] [2021-10-13 07:15:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:49,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 07:15:49,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:49,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012965734] [2021-10-13 07:15:49,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012965734] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:49,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:49,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:15:49,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111811267] [2021-10-13 07:15:49,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:49,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:15:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:49,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:49,658 INFO L87 Difference]: Start difference. First operand 186 states and 255 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:49,769 INFO L93 Difference]: Finished difference Result 390 states and 543 transitions. [2021-10-13 07:15:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:49,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-10-13 07:15:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:49,772 INFO L225 Difference]: With dead ends: 390 [2021-10-13 07:15:49,772 INFO L226 Difference]: Without dead ends: 207 [2021-10-13 07:15:49,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:49,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-13 07:15:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2021-10-13 07:15:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.357843137254902) internal successors, (277), 204 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2021-10-13 07:15:49,798 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 67 [2021-10-13 07:15:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:49,799 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2021-10-13 07:15:49,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2021-10-13 07:15:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-13 07:15:49,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:49,801 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1] [2021-10-13 07:15:49,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:15:49,802 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash -201552327, now seen corresponding path program 1 times [2021-10-13 07:15:49,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:15:49,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219139776] [2021-10-13 07:15:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:49,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:15:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 07:15:49,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:15:49,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219139776] [2021-10-13 07:15:49,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219139776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:15:49,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318157236] [2021-10-13 07:15:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:49,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:15:49,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:49,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:15:49,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:15:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:50,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:15:50,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-13 07:15:50,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-10-13 07:15:50,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318157236] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:15:50,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968618688] [2021-10-13 07:15:50,771 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2021-10-13 07:15:50,771 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:15:50,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:15:50,783 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:15:50,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:15:50,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:50,907 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:15:50,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:50,911 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:15:50,912 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:15:50,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:50,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:15:50,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 355 [2021-10-13 07:15:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:51,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 07:15:51,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:51,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:15:51,041 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:51,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:15:51,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:15:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:51,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:51,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 07:15:51,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:51,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:15:51,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:51,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:15:51,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 07:15:51,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:15:51,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 07:15:51,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:51,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:15:51,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:51,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:15:51,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-13 07:15:51,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:15:51,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:15:51,287 INFO L180 QuantifierPusher]: treesize reduction 18, result has 98.2 percent of original size [2021-10-13 07:15:51,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 987 [2021-10-13 07:15:51,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-10-13 07:15:51,315 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:996, output treesize:987 [2021-10-13 07:15:51,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:51,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:15:51,540 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_18| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:15:51,543 INFO L168 Benchmark]: Toolchain (without parser) took 6057.81 ms. Allocated memory was 92.3 MB in the beginning and 157.3 MB in the end (delta: 65.0 MB). Free memory was 58.4 MB in the beginning and 78.1 MB in the end (delta: -19.6 MB). Peak memory consumption was 69.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:51,544 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 92.3 MB. Free memory was 63.7 MB in the beginning and 63.7 MB in the end (delta: 30.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:15:51,544 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.49 ms. Allocated memory is still 92.3 MB. Free memory was 58.2 MB in the beginning and 65.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:51,545 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.22 ms. Allocated memory is still 92.3 MB. Free memory was 65.6 MB in the beginning and 63.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:51,545 INFO L168 Benchmark]: Boogie Preprocessor took 70.30 ms. Allocated memory is still 92.3 MB. Free memory was 63.2 MB in the beginning and 61.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:51,546 INFO L168 Benchmark]: RCFGBuilder took 1079.32 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 61.0 MB in the beginning and 62.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 35.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:51,547 INFO L168 Benchmark]: TraceAbstraction took 4437.63 ms. Allocated memory was 111.1 MB in the beginning and 157.3 MB in the end (delta: 46.1 MB). Free memory was 61.7 MB in the beginning and 78.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 54.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:51,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 92.3 MB. Free memory was 63.7 MB in the beginning and 63.7 MB in the end (delta: 30.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 410.49 ms. Allocated memory is still 92.3 MB. Free memory was 58.2 MB in the beginning and 65.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.22 ms. Allocated memory is still 92.3 MB. Free memory was 65.6 MB in the beginning and 63.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.30 ms. Allocated memory is still 92.3 MB. Free memory was 63.2 MB in the beginning and 61.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1079.32 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 61.0 MB in the beginning and 62.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 35.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4437.63 ms. Allocated memory was 111.1 MB in the beginning and 157.3 MB in the end (delta: 46.1 MB). Free memory was 61.7 MB in the beginning and 78.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 54.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_18| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_18|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:15:51,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:15:53,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:15:53,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:15:54,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:15:54,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:15:54,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:15:54,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:15:54,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:15:54,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:15:54,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:15:54,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:15:54,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:15:54,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:15:54,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:15:54,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:15:54,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:15:54,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:15:54,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:15:54,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:15:54,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:15:54,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:15:54,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:15:54,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:15:54,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:15:54,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:15:54,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:15:54,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:15:54,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:15:54,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:15:54,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:15:54,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:15:54,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:15:54,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:15:54,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:15:54,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:15:54,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:15:54,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:15:54,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:15:54,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:15:54,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:15:54,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:15:54,100 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:15:54,142 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:15:54,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:15:54,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:15:54,148 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:15:54,149 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:15:54,149 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:15:54,149 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:15:54,149 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:15:54,150 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:15:54,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:15:54,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:15:54,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:15:54,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:15:54,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:15:54,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:15:54,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:15:54,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:15:54,154 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:15:54,154 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:15:54,154 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:15:54,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:15:54,154 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:15:54,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:15:54,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:15:54,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:15:54,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:15:54,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:54,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:15:54,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:15:54,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:15:54,157 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:15:54,157 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:15:54,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:15:54,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:15:54,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:15:54,158 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_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2021-10-13 07:15:54,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:15:54,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:15:54,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:15:54,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:15:54,605 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:15:54,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-13 07:15:54,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data/0a9f52c7f/35a45ce1f2654620a2ae83f7ac66ee24/FLAG55a05f161 [2021-10-13 07:15:55,212 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:15:55,220 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-13 07:15:55,234 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data/0a9f52c7f/35a45ce1f2654620a2ae83f7ac66ee24/FLAG55a05f161 [2021-10-13 07:15:55,527 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/data/0a9f52c7f/35a45ce1f2654620a2ae83f7ac66ee24 [2021-10-13 07:15:55,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:15:55,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:15:55,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:55,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:15:55,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:15:55,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:55,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d8b40c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55, skipping insertion in model container [2021-10-13 07:15:55,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:55,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:15:55,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:15:55,816 WARN L228 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_9c10216a-16ac-4f1e-95cb-3607934a55f8/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-13 07:15:55,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:55,833 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:15:55,957 WARN L228 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_9c10216a-16ac-4f1e-95cb-3607934a55f8/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-13 07:15:55,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:15:55,990 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:15:55,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55 WrapperNode [2021-10-13 07:15:55,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:15:55,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:55,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:15:55,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:15:56,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:15:56,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:15:56,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:15:56,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:15:56,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:15:56,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:15:56,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:15:56,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:15:56,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (1/1) ... [2021-10-13 07:15:56,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:15:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:56,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:15:56,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:15:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:15:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:15:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:15:56,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:15:56,350 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 07:15:56,736 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-13 07:15:56,737 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-13 07:15:56,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:15:56,745 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:15:56,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:56 BoogieIcfgContainer [2021-10-13 07:15:56,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:15:56,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:15:56,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:15:56,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:15:56,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:55" (1/3) ... [2021-10-13 07:15:56,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a46b7d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:56, skipping insertion in model container [2021-10-13 07:15:56,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:55" (2/3) ... [2021-10-13 07:15:56,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a46b7d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:56, skipping insertion in model container [2021-10-13 07:15:56,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:56" (3/3) ... [2021-10-13 07:15:56,756 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2021-10-13 07:15:56,761 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:15:56,761 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:15:56,807 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:15:56,813 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, mConcurrency=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 [2021-10-13 07:15:56,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:15:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 124 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:15:56,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:56,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:56,837 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:56,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1457697026, now seen corresponding path program 1 times [2021-10-13 07:15:56,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:56,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921551265] [2021-10-13 07:15:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:56,856 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:56,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:56,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:56,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:15:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:57,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:15:57,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:57,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:57,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:57,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921551265] [2021-10-13 07:15:57,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921551265] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:57,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:57,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:15:57,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142941084] [2021-10-13 07:15:57,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:57,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:57,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:57,293 INFO L87 Difference]: Start difference. First operand has 125 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 124 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:57,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:57,492 INFO L93 Difference]: Finished difference Result 246 states and 421 transitions. [2021-10-13 07:15:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:57,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 07:15:57,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:57,506 INFO L225 Difference]: With dead ends: 246 [2021-10-13 07:15:57,506 INFO L226 Difference]: Without dead ends: 112 [2021-10-13 07:15:57,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-13 07:15:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-10-13 07:15:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.5225225225225225) internal successors, (169), 111 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 169 transitions. [2021-10-13 07:15:57,566 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 169 transitions. Word has length 24 [2021-10-13 07:15:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:57,567 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 169 transitions. [2021-10-13 07:15:57,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 169 transitions. [2021-10-13 07:15:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 07:15:57,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:57,573 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:57,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:57,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:57,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash -611475394, now seen corresponding path program 1 times [2021-10-13 07:15:57,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:57,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517382509] [2021-10-13 07:15:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:57,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:57,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:57,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:57,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:15:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:57,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:15:57,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:58,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:58,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:58,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517382509] [2021-10-13 07:15:58,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517382509] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:58,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:58,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:15:58,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432360707] [2021-10-13 07:15:58,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:58,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:58,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:58,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:58,200 INFO L87 Difference]: Start difference. First operand 112 states and 169 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:58,358 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2021-10-13 07:15:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:58,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-13 07:15:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:58,365 INFO L225 Difference]: With dead ends: 233 [2021-10-13 07:15:58,365 INFO L226 Difference]: Without dead ends: 131 [2021-10-13 07:15:58,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-13 07:15:58,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-10-13 07:15:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5) internal successors, (189), 126 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2021-10-13 07:15:58,396 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 36 [2021-10-13 07:15:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:58,397 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2021-10-13 07:15:58,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:58,398 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2021-10-13 07:15:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 07:15:58,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:58,401 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:58,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 07:15:58,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:58,612 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:58,613 INFO L82 PathProgramCache]: Analyzing trace with hash 213639527, now seen corresponding path program 1 times [2021-10-13 07:15:58,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:58,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340603404] [2021-10-13 07:15:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:58,614 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:58,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:58,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:15:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:58,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:15:58,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:15:58,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:15:59,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:59,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340603404] [2021-10-13 07:15:59,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340603404] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:59,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:59,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:15:59,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880612371] [2021-10-13 07:15:59,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:15:59,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:15:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:59,008 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:59,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:59,171 INFO L93 Difference]: Finished difference Result 265 states and 400 transitions. [2021-10-13 07:15:59,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:15:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-10-13 07:15:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:59,174 INFO L225 Difference]: With dead ends: 265 [2021-10-13 07:15:59,174 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 07:15:59,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:15:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 07:15:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2021-10-13 07:15:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 143 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2021-10-13 07:15:59,191 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 50 [2021-10-13 07:15:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:59,192 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2021-10-13 07:15:59,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2021-10-13 07:15:59,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-13 07:15:59,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:59,195 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:59,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:59,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:59,412 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash 370823208, now seen corresponding path program 1 times [2021-10-13 07:15:59,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:59,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542150923] [2021-10-13 07:15:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:59,415 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:59,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:59,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:59,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:15:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:59,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:15:59,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:15:59,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:15:59,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:59,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542150923] [2021-10-13 07:15:59,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542150923] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:15:59,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:15:59,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:15:59,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528422181] [2021-10-13 07:15:59,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:15:59,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:59,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:15:59,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:15:59,932 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:00,200 INFO L93 Difference]: Finished difference Result 349 states and 534 transitions. [2021-10-13 07:16:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:16:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-10-13 07:16:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:00,203 INFO L225 Difference]: With dead ends: 349 [2021-10-13 07:16:00,203 INFO L226 Difference]: Without dead ends: 215 [2021-10-13 07:16:00,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-13 07:16:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2021-10-13 07:16:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.441747572815534) internal successors, (297), 206 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 297 transitions. [2021-10-13 07:16:00,218 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 297 transitions. Word has length 67 [2021-10-13 07:16:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:00,218 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 297 transitions. [2021-10-13 07:16:00,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 297 transitions. [2021-10-13 07:16:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-13 07:16:00,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:00,221 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:00,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:00,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:00,433 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1528022105, now seen corresponding path program 1 times [2021-10-13 07:16:00,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:00,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897754091] [2021-10-13 07:16:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:00,435 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:00,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:00,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:00,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:16:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:00,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:16:00,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:16:00,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 07:16:00,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:00,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897754091] [2021-10-13 07:16:00,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897754091] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:00,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:00,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:16:00,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694921843] [2021-10-13 07:16:00,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:16:00,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:00,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:16:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:00,961 INFO L87 Difference]: Start difference. First operand 207 states and 297 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:01,101 INFO L93 Difference]: Finished difference Result 427 states and 620 transitions. [2021-10-13 07:16:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:16:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-13 07:16:01,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:01,104 INFO L225 Difference]: With dead ends: 427 [2021-10-13 07:16:01,104 INFO L226 Difference]: Without dead ends: 230 [2021-10-13 07:16:01,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-13 07:16:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2021-10-13 07:16:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.4266666666666667) internal successors, (321), 225 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 321 transitions. [2021-10-13 07:16:01,137 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 321 transitions. Word has length 68 [2021-10-13 07:16:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:01,138 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 321 transitions. [2021-10-13 07:16:01,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 321 transitions. [2021-10-13 07:16:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-13 07:16:01,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:01,140 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:01,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:01,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:01,352 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:01,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1678422895, now seen corresponding path program 1 times [2021-10-13 07:16:01,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:01,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209864086] [2021-10-13 07:16:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:01,353 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:01,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:01,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:01,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:16:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:01,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:16:01,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-13 07:16:01,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-13 07:16:01,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:01,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209864086] [2021-10-13 07:16:01,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209864086] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:01,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:01,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:16:01,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139007819] [2021-10-13 07:16:01,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:16:01,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:01,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:16:01,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:01,944 INFO L87 Difference]: Start difference. First operand 226 states and 321 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:02,069 INFO L93 Difference]: Finished difference Result 466 states and 670 transitions. [2021-10-13 07:16:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:16:02,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-10-13 07:16:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:02,072 INFO L225 Difference]: With dead ends: 466 [2021-10-13 07:16:02,072 INFO L226 Difference]: Without dead ends: 250 [2021-10-13 07:16:02,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-13 07:16:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2021-10-13 07:16:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.410569105691057) internal successors, (347), 246 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 347 transitions. [2021-10-13 07:16:02,087 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 347 transitions. Word has length 84 [2021-10-13 07:16:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:02,088 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 347 transitions. [2021-10-13 07:16:02,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 347 transitions. [2021-10-13 07:16:02,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-13 07:16:02,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:02,095 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:02,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 07:16:02,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:02,309 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1619803512, now seen corresponding path program 1 times [2021-10-13 07:16:02,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:02,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30732356] [2021-10-13 07:16:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:02,318 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:02,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:02,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:02,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:16:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:02,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:16:02,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 07:16:02,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 07:16:03,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:03,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30732356] [2021-10-13 07:16:03,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30732356] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:03,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:03,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:16:03,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743137622] [2021-10-13 07:16:03,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:16:03,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:16:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:03,136 INFO L87 Difference]: Start difference. First operand 247 states and 347 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:03,200 INFO L93 Difference]: Finished difference Result 743 states and 1042 transitions. [2021-10-13 07:16:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:16:03,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-10-13 07:16:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:03,204 INFO L225 Difference]: With dead ends: 743 [2021-10-13 07:16:03,204 INFO L226 Difference]: Without dead ends: 506 [2021-10-13 07:16:03,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-10-13 07:16:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-10-13 07:16:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.39009900990099) internal successors, (702), 505 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 702 transitions. [2021-10-13 07:16:03,228 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 702 transitions. Word has length 103 [2021-10-13 07:16:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:03,228 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 702 transitions. [2021-10-13 07:16:03,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 702 transitions. [2021-10-13 07:16:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-13 07:16:03,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:03,231 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:03,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:03,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:03,446 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:03,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:03,447 INFO L82 PathProgramCache]: Analyzing trace with hash -847602632, now seen corresponding path program 1 times [2021-10-13 07:16:03,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:03,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103225201] [2021-10-13 07:16:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:03,449 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:03,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:03,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:03,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:16:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:03,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:16:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 07:16:03,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 07:16:04,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:04,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103225201] [2021-10-13 07:16:04,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103225201] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:04,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:04,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:16:04,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197194645] [2021-10-13 07:16:04,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:16:04,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:16:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:04,228 INFO L87 Difference]: Start difference. First operand 506 states and 702 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:04,261 INFO L93 Difference]: Finished difference Result 1023 states and 1418 transitions. [2021-10-13 07:16:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:16:04,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-10-13 07:16:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:04,265 INFO L225 Difference]: With dead ends: 1023 [2021-10-13 07:16:04,266 INFO L226 Difference]: Without dead ends: 527 [2021-10-13 07:16:04,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-10-13 07:16:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2021-10-13 07:16:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.3859315589353611) internal successors, (729), 526 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 729 transitions. [2021-10-13 07:16:04,286 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 729 transitions. Word has length 103 [2021-10-13 07:16:04,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:04,286 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 729 transitions. [2021-10-13 07:16:04,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 729 transitions. [2021-10-13 07:16:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-13 07:16:04,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:04,289 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:04,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:04,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:04,501 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:04,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1168582955, now seen corresponding path program 1 times [2021-10-13 07:16:04,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:04,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041418064] [2021-10-13 07:16:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:04,503 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:04,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:04,504 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:04,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:16:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:04,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:16:04,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-13 07:16:05,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-13 07:16:05,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:05,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041418064] [2021-10-13 07:16:05,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041418064] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:05,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:05,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:16:05,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566073045] [2021-10-13 07:16:05,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:16:05,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:05,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:16:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:05,272 INFO L87 Difference]: Start difference. First operand 527 states and 729 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:05,298 INFO L93 Difference]: Finished difference Result 1070 states and 1478 transitions. [2021-10-13 07:16:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:16:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-10-13 07:16:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:05,304 INFO L225 Difference]: With dead ends: 1070 [2021-10-13 07:16:05,304 INFO L226 Difference]: Without dead ends: 553 [2021-10-13 07:16:05,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-10-13 07:16:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-10-13 07:16:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.3804347826086956) internal successors, (762), 552 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 762 transitions. [2021-10-13 07:16:05,326 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 762 transitions. Word has length 104 [2021-10-13 07:16:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:05,326 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 762 transitions. [2021-10-13 07:16:05,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 762 transitions. [2021-10-13 07:16:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-13 07:16:05,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:05,329 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:05,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:05,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:05,541 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:05,541 INFO L82 PathProgramCache]: Analyzing trace with hash -53319870, now seen corresponding path program 1 times [2021-10-13 07:16:05,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:05,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961272034] [2021-10-13 07:16:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:05,542 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:05,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:05,545 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:05,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:16:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:05,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:16:05,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-13 07:16:06,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-13 07:16:06,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:06,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961272034] [2021-10-13 07:16:06,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961272034] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:06,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:06,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:16:06,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139960627] [2021-10-13 07:16:06,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:16:06,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:16:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:06,324 INFO L87 Difference]: Start difference. First operand 553 states and 762 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:06,392 INFO L93 Difference]: Finished difference Result 1520 states and 2113 transitions. [2021-10-13 07:16:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:16:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-13 07:16:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:06,399 INFO L225 Difference]: With dead ends: 1520 [2021-10-13 07:16:06,399 INFO L226 Difference]: Without dead ends: 1003 [2021-10-13 07:16:06,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-10-13 07:16:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2021-10-13 07:16:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.3892215568862276) internal successors, (1392), 1002 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1392 transitions. [2021-10-13 07:16:06,452 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1392 transitions. Word has length 105 [2021-10-13 07:16:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:06,453 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1392 transitions. [2021-10-13 07:16:06,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1392 transitions. [2021-10-13 07:16:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-10-13 07:16:06,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:06,458 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:06,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:06,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:06,670 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1519363111, now seen corresponding path program 1 times [2021-10-13 07:16:06,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:06,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791024758] [2021-10-13 07:16:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:06,671 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:06,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:06,673 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:06,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:16:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:07,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:16:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-13 07:16:07,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-13 07:16:07,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:07,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791024758] [2021-10-13 07:16:07,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791024758] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:07,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:07,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:16:07,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914757972] [2021-10-13 07:16:07,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:16:07,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:07,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:16:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:07,806 INFO L87 Difference]: Start difference. First operand 1003 states and 1392 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:08,035 INFO L93 Difference]: Finished difference Result 2091 states and 2938 transitions. [2021-10-13 07:16:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:16:08,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-10-13 07:16:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:08,042 INFO L225 Difference]: With dead ends: 2091 [2021-10-13 07:16:08,042 INFO L226 Difference]: Without dead ends: 1124 [2021-10-13 07:16:08,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:16:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-10-13 07:16:08,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1095. [2021-10-13 07:16:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 1.3711151736745886) internal successors, (1500), 1094 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1500 transitions. [2021-10-13 07:16:08,085 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1500 transitions. Word has length 173 [2021-10-13 07:16:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:08,085 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1500 transitions. [2021-10-13 07:16:08,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1500 transitions. [2021-10-13 07:16:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-10-13 07:16:08,090 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:08,090 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2021-10-13 07:16:08,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:08,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:08,302 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash -759567935, now seen corresponding path program 1 times [2021-10-13 07:16:08,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:08,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923733744] [2021-10-13 07:16:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:08,304 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:08,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:08,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:08,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:16:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:08,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:16:08,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-13 07:16:09,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-13 07:16:09,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:09,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923733744] [2021-10-13 07:16:09,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923733744] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:09,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:09,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:16:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41819379] [2021-10-13 07:16:09,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:16:09,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:09,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:16:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:09,825 INFO L87 Difference]: Start difference. First operand 1095 states and 1500 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:09,887 INFO L93 Difference]: Finished difference Result 2409 states and 3304 transitions. [2021-10-13 07:16:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:16:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-10-13 07:16:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:09,896 INFO L225 Difference]: With dead ends: 2409 [2021-10-13 07:16:09,896 INFO L226 Difference]: Without dead ends: 1350 [2021-10-13 07:16:09,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:16:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-10-13 07:16:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1350. [2021-10-13 07:16:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.369162342475908) internal successors, (1847), 1349 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1847 transitions. [2021-10-13 07:16:09,951 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1847 transitions. Word has length 194 [2021-10-13 07:16:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:09,952 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 1847 transitions. [2021-10-13 07:16:09,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1847 transitions. [2021-10-13 07:16:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-10-13 07:16:09,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:09,957 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-10-13 07:16:09,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:10,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:10,170 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:10,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash 342847369, now seen corresponding path program 1 times [2021-10-13 07:16:10,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:10,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389595487] [2021-10-13 07:16:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:10,171 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:10,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:10,172 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:10,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:16:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:16:10,825 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:16:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:16:11,202 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:16:11,202 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:16:11,203 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:16:11,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:11,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:11,413 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:16:11,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:16:11 BoogieIcfgContainer [2021-10-13 07:16:11,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:16:11,593 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:16:11,593 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:16:11,594 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:16:11,594 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:56" (3/4) ... [2021-10-13 07:16:11,595 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:16:11,767 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:16:11,767 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:16:11,769 INFO L168 Benchmark]: Toolchain (without parser) took 16236.22 ms. Allocated memory was 54.5 MB in the beginning and 113.2 MB in the end (delta: 58.7 MB). Free memory was 32.1 MB in the beginning and 73.7 MB in the end (delta: -41.6 MB). Peak memory consumption was 49.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:11,770 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory was 35.7 MB in the beginning and 35.7 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:16:11,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 456.89 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 31.9 MB in the beginning and 56.1 MB in the end (delta: -24.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:11,771 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.83 ms. Allocated memory is still 75.5 MB. Free memory was 56.1 MB in the beginning and 53.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:11,771 INFO L168 Benchmark]: Boogie Preprocessor took 36.59 ms. Allocated memory is still 75.5 MB. Free memory was 53.4 MB in the beginning and 51.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:11,772 INFO L168 Benchmark]: RCFGBuilder took 648.63 ms. Allocated memory is still 75.5 MB. Free memory was 51.3 MB in the beginning and 49.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:11,772 INFO L168 Benchmark]: TraceAbstraction took 14843.14 ms. Allocated memory was 75.5 MB in the beginning and 94.4 MB in the end (delta: 18.9 MB). Free memory was 48.6 MB in the beginning and 46.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 52.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:11,773 INFO L168 Benchmark]: Witness Printer took 174.19 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 46.9 MB in the beginning and 73.7 MB in the end (delta: -26.8 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:11,778 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory was 35.7 MB in the beginning and 35.7 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 456.89 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 31.9 MB in the beginning and 56.1 MB in the end (delta: -24.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.83 ms. Allocated memory is still 75.5 MB. Free memory was 56.1 MB in the beginning and 53.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.59 ms. Allocated memory is still 75.5 MB. Free memory was 53.4 MB in the beginning and 51.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 648.63 ms. Allocated memory is still 75.5 MB. Free memory was 51.3 MB in the beginning and 49.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14843.14 ms. Allocated memory was 75.5 MB in the beginning and 94.4 MB in the end (delta: 18.9 MB). Free memory was 48.6 MB in the beginning and 46.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 52.1 MB. Max. memory is 16.1 GB. * Witness Printer took 174.19 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 46.9 MB in the beginning and 73.7 MB in the end (delta: -26.8 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 609]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 = __VERIFIER_nondet_int(); [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags = __VERIFIER_nondet_int(); [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 = __VERIFIER_nondet_int(); [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND FALSE !(tmp___1 - 12288) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L609] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 125 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14605.9ms, OverallIterations: 13, TraceHistogramMax: 11, EmptinessCheckTime: 46.3ms, AutomataDifference: 1658.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2289 SDtfs, 1120 SDslu, 1557 SDs, 0 SdLazy, 933 SolverSat, 167 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 911.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2198 GetRequests, 2182 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1350occurred in iteration=12, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 350.5ms AutomataMinimizationTime, 12 MinimizatonAttempts, 52 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 264.9ms SsaConstructionTime, 679.6ms SatisfiabilityAnalysisTime, 5416.9ms InterpolantComputationTime, 1307 NumberOfCodeBlocks, 1307 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 2198 ConstructedInterpolants, 0 QuantifiedInterpolants, 3411 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1990 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 24 InterpolantComputations, 24 PerfectInterpolantSequences, 3576/3576 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! [2021-10-13 07:16:11,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c10216a-16ac-4f1e-95cb-3607934a55f8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...