./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE --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 779f52a505225a2863eaa5ba1ff17e23b2862905d35faf40083a0ee0efa08e33 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE --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 779f52a505225a2863eaa5ba1ff17e23b2862905d35faf40083a0ee0efa08e33 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-e943c26 [2021-10-24 09:40:36,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:40:36,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:40:36,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:40:36,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:40:36,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:40:36,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:40:36,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:40:36,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:40:36,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:40:36,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:40:36,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:40:36,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:40:36,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:40:36,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:40:36,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:40:36,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:40:36,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:40:36,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:40:36,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:40:36,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:40:36,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:40:36,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:40:36,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:40:36,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:40:36,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:40:36,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:40:36,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:40:36,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:40:36,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:40:36,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:40:36,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:40:36,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:40:36,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:40:36,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:40:36,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:40:36,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:40:36,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:40:36,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:40:36,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:40:36,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:40:36,448 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 09:40:36,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:40:36,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:40:36,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:40:36,480 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:40:36,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:40:36,480 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:40:36,480 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 09:40:36,480 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:40:36,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:40:36,481 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 09:40:36,481 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 09:40:36,481 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:40:36,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 09:40:36,482 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 09:40:36,482 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 09:40:36,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:40:36,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:40:36,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 09:40:36,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:40:36,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:40:36,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:40:36,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:40:36,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:40:36,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:40:36,484 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:40:36,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:40:36,485 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:40:36,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:40:36,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:40:36,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:40:36,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:40:36,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:40:36,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:40:36,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:40:36,486 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 09:40:36,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 09:40:36,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:40:36,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:40:36,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:40:36,487 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_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f52a505225a2863eaa5ba1ff17e23b2862905d35faf40083a0ee0efa08e33 [2021-10-24 09:40:36,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:40:36,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:40:36,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:40:36,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:40:36,781 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:40:36,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c [2021-10-24 09:40:36,879 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data/01255db53/5d61ec57cbc64a90a36984844b0e9e44/FLAGe6ec29c10 [2021-10-24 09:40:37,378 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:40:37,379 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c [2021-10-24 09:40:37,391 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data/01255db53/5d61ec57cbc64a90a36984844b0e9e44/FLAGe6ec29c10 [2021-10-24 09:40:37,740 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data/01255db53/5d61ec57cbc64a90a36984844b0e9e44 [2021-10-24 09:40:37,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:40:37,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:40:37,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:40:37,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:40:37,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:40:37,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:40:37" (1/1) ... [2021-10-24 09:40:37,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@114021d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:37, skipping insertion in model container [2021-10-24 09:40:37,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:40:37" (1/1) ... [2021-10-24 09:40:37,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:40:37,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:40:38,078 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_a28d0bc1-432e-4b39-ac11-9094f9d452ce/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c[37579,37592] [2021-10-24 09:40:38,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:40:38,107 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:40:38,190 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_a28d0bc1-432e-4b39-ac11-9094f9d452ce/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c[37579,37592] [2021-10-24 09:40:38,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:40:38,206 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:40:38,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38 WrapperNode [2021-10-24 09:40:38,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:40:38,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:40:38,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:40:38,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:40:38,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:40:38,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:40:38,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:40:38,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:40:38,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:40:38,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:40:38,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:40:38,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:40:38,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (1/1) ... [2021-10-24 09:40:38,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:40:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:40:38,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:40:38,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:40:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 09:40:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:40:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:40:38,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:40:38,587 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-24 09:40:39,083 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##87: assume false; [2021-10-24 09:40:39,083 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##88: assume !false; [2021-10-24 09:40:39,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:40:39,579 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 09:40:39,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:40:39 BoogieIcfgContainer [2021-10-24 09:40:39,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:40:39,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:40:39,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:40:39,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:40:39,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:40:37" (1/3) ... [2021-10-24 09:40:39,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3156d79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:40:39, skipping insertion in model container [2021-10-24 09:40:39,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:38" (2/3) ... [2021-10-24 09:40:39,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3156d79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:40:39, skipping insertion in model container [2021-10-24 09:40:39,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:40:39" (3/3) ... [2021-10-24 09:40:39,602 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.BV.c.cil-2a.c [2021-10-24 09:40:39,608 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:40:39,608 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 09:40:39,676 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:40:39,681 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 09:40:39,681 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 09:40:39,698 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) [2021-10-24 09:40:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-24 09:40:39,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:39,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:40:39,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1895066675, now seen corresponding path program 1 times [2021-10-24 09:40:39,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:40:39,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467902963] [2021-10-24 09:40:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:39,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:40:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:40:39,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:40:39,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467902963] [2021-10-24 09:40:39,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467902963] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:40:39,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:40:39,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 09:40:39,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381247914] [2021-10-24 09:40:39,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:40:39,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:40:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:40:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:40,011 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) [2021-10-24 09:40:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:40,194 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2021-10-24 09:40:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:40:40,196 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 [2021-10-24 09:40:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:40,210 INFO L225 Difference]: With dead ends: 169 [2021-10-24 09:40:40,210 INFO L226 Difference]: Without dead ends: 83 [2021-10-24 09:40:40,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-24 09:40:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-24 09:40:40,261 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) [2021-10-24 09:40:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2021-10-24 09:40:40,266 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2021-10-24 09:40:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:40,267 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2021-10-24 09:40:40,268 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) [2021-10-24 09:40:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2021-10-24 09:40:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-24 09:40:40,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:40,270 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] [2021-10-24 09:40:40,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 09:40:40,270 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:40,275 INFO L82 PathProgramCache]: Analyzing trace with hash 9926788, now seen corresponding path program 1 times [2021-10-24 09:40:40,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:40:40,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723176368] [2021-10-24 09:40:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:40,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:40:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:40:40,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:40:40,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723176368] [2021-10-24 09:40:40,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723176368] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:40:40,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:40:40,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 09:40:40,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641435361] [2021-10-24 09:40:40,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:40:40,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:40:40,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:40:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:40,347 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) [2021-10-24 09:40:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:40,492 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2021-10-24 09:40:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:40:40,492 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 [2021-10-24 09:40:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:40,498 INFO L225 Difference]: With dead ends: 178 [2021-10-24 09:40:40,498 INFO L226 Difference]: Without dead ends: 98 [2021-10-24 09:40:40,500 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 [2021-10-24 09:40:40,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-24 09:40:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-24 09:40:40,519 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) [2021-10-24 09:40:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2021-10-24 09:40:40,522 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2021-10-24 09:40:40,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:40,523 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2021-10-24 09:40:40,523 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) [2021-10-24 09:40:40,523 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2021-10-24 09:40:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-24 09:40:40,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:40,526 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] [2021-10-24 09:40:40,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 09:40:40,528 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash 926223436, now seen corresponding path program 1 times [2021-10-24 09:40:40,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:40:40,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732013997] [2021-10-24 09:40:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:40,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:40:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 09:40:40,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:40:40,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732013997] [2021-10-24 09:40:40,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732013997] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:40:40,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:40:40,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 09:40:40,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002146413] [2021-10-24 09:40:40,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:40:40,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:40:40,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:40:40,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:40,619 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) [2021-10-24 09:40:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:40,742 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2021-10-24 09:40:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:40:40,743 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 [2021-10-24 09:40:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:40,744 INFO L225 Difference]: With dead ends: 206 [2021-10-24 09:40:40,745 INFO L226 Difference]: Without dead ends: 113 [2021-10-24 09:40:40,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-24 09:40:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-10-24 09:40:40,753 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) [2021-10-24 09:40:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2021-10-24 09:40:40,754 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2021-10-24 09:40:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:40,755 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2021-10-24 09:40:40,755 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) [2021-10-24 09:40:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2021-10-24 09:40:40,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-24 09:40:40,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:40,758 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] [2021-10-24 09:40:40,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 09:40:40,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:40,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:40,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1745436620, now seen corresponding path program 1 times [2021-10-24 09:40:40,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:40:40,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051768008] [2021-10-24 09:40:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:40,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:40:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:40:40,815 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 09:40:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:40:40,911 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 09:40:40,912 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 09:40:40,914 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:40:40,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 09:40:40,922 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:40:41,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:40:41 BoogieIcfgContainer [2021-10-24 09:40:41,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:40:41,010 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:40:41,010 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:40:41,010 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:40:41,011 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:40:39" (3/4) ... [2021-10-24 09:40:41,014 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 09:40:41,014 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:40:41,017 INFO L168 Benchmark]: Toolchain (without parser) took 3271.67 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 81.6 MB in the beginning and 112.0 MB in the end (delta: -30.4 MB). Peak memory consumption was 943.6 kB. Max. memory is 16.1 GB. [2021-10-24 09:40:41,017 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 109.1 MB. Free memory is still 66.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:40:41,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 461.49 ms. Allocated memory is still 109.1 MB. Free memory was 81.3 MB in the beginning and 81.4 MB in the end (delta: -61.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:40:41,019 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.59 ms. Allocated memory is still 109.1 MB. Free memory was 81.4 MB in the beginning and 78.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:40:41,019 INFO L168 Benchmark]: Boogie Preprocessor took 73.26 ms. Allocated memory is still 109.1 MB. Free memory was 78.5 MB in the beginning and 76.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:40:41,020 INFO L168 Benchmark]: RCFGBuilder took 1211.94 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 76.3 MB in the beginning and 86.6 MB in the end (delta: -10.3 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2021-10-24 09:40:41,021 INFO L168 Benchmark]: TraceAbstraction took 1423.70 ms. Allocated memory is still 140.5 MB. Free memory was 86.1 MB in the beginning and 112.9 MB in the end (delta: -26.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. [2021-10-24 09:40:41,022 INFO L168 Benchmark]: Witness Printer took 4.72 ms. Allocated memory is still 140.5 MB. Free memory was 112.9 MB in the beginning and 112.0 MB in the end (delta: 930.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:40:41,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 109.1 MB. Free memory is still 66.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 461.49 ms. Allocated memory is still 109.1 MB. Free memory was 81.3 MB in the beginning and 81.4 MB in the end (delta: -61.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 87.59 ms. Allocated memory is still 109.1 MB. Free memory was 81.4 MB in the beginning and 78.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.26 ms. Allocated memory is still 109.1 MB. Free memory was 78.5 MB in the beginning and 76.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1211.94 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 76.3 MB in the beginning and 86.6 MB in the end (delta: -10.3 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1423.70 ms. Allocated memory is still 140.5 MB. Free memory was 86.1 MB in the beginning and 112.9 MB in the end (delta: -26.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. * Witness Printer took 4.72 ms. Allocated memory is still 140.5 MB. Free memory was 112.9 MB in the beginning and 112.0 MB in the end (delta: 930.4 kB). There was no memory consumed. 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 - UnprovableResult [Line: 616]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 303. Possible FailurePath: [L625] 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 ; [L65] int ag_Z ; [L66] int __retres60 ; [L69] s__state = 12292 [L70] blastFlag = 0 [L71] tmp = __VERIFIER_nondet_int() [L72] cb = 0 [L73] ret = -1 [L74] skip = 0 [L75] tmp___0 = 0 [L76] COND FALSE !(s__info_callback != 0) [L79] COND FALSE !(s__ctx__info_callback != 0) [L85] s__in_handshake = s__in_handshake + 1 [L86] COND FALSE !(tmp___1 + 12288) [L95] COND TRUE \read(s__hit) [L96] ag_Y = 208 [L101] COND TRUE 1 [L103] state = s__state [L104] COND TRUE s__state == 12292 [L207] s__new_session = 1 [L208] s__state = 4096 [L209] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L214] s__server = 0 [L215] COND FALSE !(cb != 0) [L220] COND FALSE !(s__version + 65280 != 768) [L226] s__type = 4096 [L227] COND FALSE !((unsigned long )s__init_buf___0 == (unsigned long )((void *)0)) [L245] COND FALSE !(! tmp___4) [L251] COND FALSE !(! tmp___5) [L257] s__state = 4368 [L258] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L259] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND TRUE s__state == 4368 [L263] s__shutdown = 0 [L264] ret = __VERIFIER_nondet_int() [L265] COND TRUE blastFlag == 0 [L266] blastFlag = 1 [L270] COND FALSE !(ret <= 0) [L275] s__state = 4384 [L276] ag_X = s__state - 32 [L277] s__init_num = 0 [L278] COND FALSE !((unsigned long )s__bbio != (unsigned long )s__wbio) [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND TRUE s__state == 4384 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L296] COND FALSE !(ret <= 0) [L301] s__state = ag_X [L302] COND TRUE \read(s__hit) [L303] s__state = s__state | ag_Y [L307] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND FALSE !(s__state == 4384) [L128] COND FALSE !(s__state == 4385) [L131] COND FALSE !(s__state == 4400) [L134] COND FALSE !(s__state == 4401) [L137] COND FALSE !(s__state == 4416) [L140] COND FALSE !(s__state == 4417) [L143] COND TRUE s__state == 4432 [L353] ret = __VERIFIER_nondet_int() [L354] COND TRUE blastFlag <= 5 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1246.9ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 17.4ms, AutomataDifference: 503.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 375 SDtfs, 16 SDslu, 138 SDs, 0 SdLazy, 256 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 248.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=3, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 68.6ms AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 24.6ms SsaConstructionTime, 172.3ms SatisfiabilityAnalysisTime, 182.9ms InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 83 ConstructedInterpolants, 0 QuantifiedInterpolants, 127 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 15/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-24 09:40:41,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/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-e943c26 [2021-10-24 09:40:43,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:40:43,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:40:43,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:40:43,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:40:43,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:40:43,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:40:43,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:40:43,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:40:43,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:40:43,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:40:43,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:40:43,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:40:43,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:40:43,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:40:43,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:40:43,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:40:43,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:40:43,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:40:43,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:40:43,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:40:43,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:40:43,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:40:43,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:40:43,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:40:43,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:40:43,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:40:43,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:40:43,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:40:43,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:40:43,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:40:43,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:40:43,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:40:43,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:40:43,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:40:43,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:40:43,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:40:43,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:40:43,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:40:43,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:40:43,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:40:43,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 09:40:43,761 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:40:43,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:40:43,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:40:43,763 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:40:43,763 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:40:43,763 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:40:43,764 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:40:43,764 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:40:43,764 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:40:43,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:40:43,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:40:43,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:40:43,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:40:43,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:40:43,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:40:43,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:40:43,768 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:40:43,768 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 09:40:43,768 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 09:40:43,768 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:40:43,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:40:43,769 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:40:43,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:40:43,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:40:43,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 09:40:43,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:40:43,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:40:43,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:40:43,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:40:43,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:40:43,770 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 09:40:43,771 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 09:40:43,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:40:43,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:40:43,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:40:43,772 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_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f52a505225a2863eaa5ba1ff17e23b2862905d35faf40083a0ee0efa08e33 [2021-10-24 09:40:44,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:40:44,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:40:44,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:40:44,179 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:40:44,180 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:40:44,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c [2021-10-24 09:40:44,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data/a73a1c0c5/d0693c3314b94352bdece36f444726ab/FLAGfbf1370bb [2021-10-24 09:40:44,798 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:40:44,798 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c [2021-10-24 09:40:44,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data/a73a1c0c5/d0693c3314b94352bdece36f444726ab/FLAGfbf1370bb [2021-10-24 09:40:45,124 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/data/a73a1c0c5/d0693c3314b94352bdece36f444726ab [2021-10-24 09:40:45,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:40:45,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:40:45,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:40:45,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:40:45,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:40:45,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd34aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45, skipping insertion in model container [2021-10-24 09:40:45,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:40:45,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:40:45,517 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_a28d0bc1-432e-4b39-ac11-9094f9d452ce/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c[37579,37592] [2021-10-24 09:40:45,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:40:45,589 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:40:45,656 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_a28d0bc1-432e-4b39-ac11-9094f9d452ce/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-2a.c[37579,37592] [2021-10-24 09:40:45,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:40:45,672 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:40:45,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45 WrapperNode [2021-10-24 09:40:45,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:40:45,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:40:45,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:40:45,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:40:45,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:40:45,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:40:45,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:40:45,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:40:45,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:40:45,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:40:45,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:40:45,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:40:45,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (1/1) ... [2021-10-24 09:40:45,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:40:45,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:40:45,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:40:45,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:40:45,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 09:40:45,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:40:45,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:40:45,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:40:46,073 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-24 09:40:46,612 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##87: assume false; [2021-10-24 09:40:46,615 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##88: assume !false; [2021-10-24 09:40:46,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:40:46,627 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 09:40:46,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:40:46 BoogieIcfgContainer [2021-10-24 09:40:46,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:40:46,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:40:46,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:40:46,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:40:46,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:40:45" (1/3) ... [2021-10-24 09:40:46,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94e1021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:40:46, skipping insertion in model container [2021-10-24 09:40:46,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:40:45" (2/3) ... [2021-10-24 09:40:46,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94e1021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:40:46, skipping insertion in model container [2021-10-24 09:40:46,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:40:46" (3/3) ... [2021-10-24 09:40:46,641 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.BV.c.cil-2a.c [2021-10-24 09:40:46,647 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:40:46,647 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 09:40:46,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:40:46,718 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 09:40:46,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 09:40:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 124 states have (on average 1.7338709677419355) internal successors, (215), 125 states have internal predecessors, (215), 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) [2021-10-24 09:40:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-24 09:40:46,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:46,749 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, 1] [2021-10-24 09:40:46,750 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:46,756 INFO L82 PathProgramCache]: Analyzing trace with hash 259999105, now seen corresponding path program 1 times [2021-10-24 09:40:46,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:40:46,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516623299] [2021-10-24 09:40:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:46,770 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:40:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:40:46,773 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:40:46,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 09:40:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:40:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:40:47,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:40:47,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:40:47,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516623299] [2021-10-24 09:40:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516623299] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:40:47,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:40:47,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 09:40:47,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447023886] [2021-10-24 09:40:47,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:40:47,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:40:47,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:40:47,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:47,258 INFO L87 Difference]: Start difference. First operand has 126 states, 124 states have (on average 1.7338709677419355) internal successors, (215), 125 states have internal predecessors, (215), 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 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-24 09:40:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:47,512 INFO L93 Difference]: Finished difference Result 247 states and 423 transitions. [2021-10-24 09:40:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:40:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 25 [2021-10-24 09:40:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:47,529 INFO L225 Difference]: With dead ends: 247 [2021-10-24 09:40:47,530 INFO L226 Difference]: Without dead ends: 113 [2021-10-24 09:40:47,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-24 09:40:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-10-24 09:40:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.5267857142857142) internal successors, (171), 112 states have internal predecessors, (171), 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) [2021-10-24 09:40:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 171 transitions. [2021-10-24 09:40:47,611 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 171 transitions. Word has length 25 [2021-10-24 09:40:47,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:47,611 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 171 transitions. [2021-10-24 09:40:47,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-24 09:40:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 171 transitions. [2021-10-24 09:40:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-24 09:40:47,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:47,617 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, 1] [2021-10-24 09:40:47,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 09:40:47,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:40:47,830 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:47,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:47,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1138040513, now seen corresponding path program 1 times [2021-10-24 09:40:47,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:40:47,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799241240] [2021-10-24 09:40:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:47,833 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:40:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:40:47,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:40:47,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 09:40:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:47,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:40:47,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:40:48,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:40:48,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:40:48,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799241240] [2021-10-24 09:40:48,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799241240] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:40:48,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:40:48,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 09:40:48,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715408214] [2021-10-24 09:40:48,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:40:48,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:40:48,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:40:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:48,239 INFO L87 Difference]: Start difference. First operand 113 states and 171 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-10-24 09:40:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:48,414 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2021-10-24 09:40:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:40:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2021-10-24 09:40:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:48,417 INFO L225 Difference]: With dead ends: 233 [2021-10-24 09:40:48,417 INFO L226 Difference]: Without dead ends: 131 [2021-10-24 09:40:48,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-24 09:40:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-10-24 09:40:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.5039370078740157) internal successors, (191), 127 states have internal predecessors, (191), 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) [2021-10-24 09:40:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 191 transitions. [2021-10-24 09:40:48,430 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 191 transitions. Word has length 37 [2021-10-24 09:40:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:48,430 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 191 transitions. [2021-10-24 09:40:48,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-10-24 09:40:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 191 transitions. [2021-10-24 09:40:48,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-24 09:40:48,433 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:48,433 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, 1] [2021-10-24 09:40:48,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 09:40:48,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:40:48,647 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:48,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1126420040, now seen corresponding path program 1 times [2021-10-24 09:40:48,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:40:48,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681220402] [2021-10-24 09:40:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:48,649 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:40:48,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:40:48,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:40:48,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 09:40:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:40:48,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 09:40:48,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 09:40:49,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:40:49,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681220402] [2021-10-24 09:40:49,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681220402] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:40:49,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:40:49,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 09:40:49,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78969708] [2021-10-24 09:40:49,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:40:49,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:40:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:40:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:49,112 INFO L87 Difference]: Start difference. First operand 128 states and 191 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-10-24 09:40:49,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:49,133 INFO L93 Difference]: Finished difference Result 271 states and 400 transitions. [2021-10-24 09:40:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:40:49,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 51 [2021-10-24 09:40:49,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:49,139 INFO L225 Difference]: With dead ends: 271 [2021-10-24 09:40:49,139 INFO L226 Difference]: Without dead ends: 154 [2021-10-24 09:40:49,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-24 09:40:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-10-24 09:40:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 153 states have internal predecessors, (224), 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) [2021-10-24 09:40:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 224 transitions. [2021-10-24 09:40:49,165 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 224 transitions. Word has length 51 [2021-10-24 09:40:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:49,166 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 224 transitions. [2021-10-24 09:40:49,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-10-24 09:40:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 224 transitions. [2021-10-24 09:40:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-24 09:40:49,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:49,169 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, 1] [2021-10-24 09:40:49,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 09:40:49,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:40:49,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:49,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:49,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1260433546, now seen corresponding path program 1 times [2021-10-24 09:40:49,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:40:49,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123308966] [2021-10-24 09:40:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:49,375 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:40:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:40:49,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:40:49,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 09:40:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:40:49,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 09:40:49,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 09:40:49,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:40:49,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123308966] [2021-10-24 09:40:49,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123308966] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:40:49,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:40:49,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 09:40:49,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37796309] [2021-10-24 09:40:49,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:40:49,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:40:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:40:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:49,840 INFO L87 Difference]: Start difference. First operand 154 states and 224 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-10-24 09:40:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:49,995 INFO L93 Difference]: Finished difference Result 292 states and 435 transitions. [2021-10-24 09:40:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:40:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 51 [2021-10-24 09:40:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:49,998 INFO L225 Difference]: With dead ends: 292 [2021-10-24 09:40:49,999 INFO L226 Difference]: Without dead ends: 175 [2021-10-24 09:40:50,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-24 09:40:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-10-24 09:40:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.4470588235294117) internal successors, (246), 170 states have internal predecessors, (246), 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) [2021-10-24 09:40:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 246 transitions. [2021-10-24 09:40:50,023 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 246 transitions. Word has length 51 [2021-10-24 09:40:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:50,024 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 246 transitions. [2021-10-24 09:40:50,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-10-24 09:40:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 246 transitions. [2021-10-24 09:40:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-24 09:40:50,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:50,028 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] [2021-10-24 09:40:50,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 09:40:50,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:40:50,228 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash -457628469, now seen corresponding path program 1 times [2021-10-24 09:40:50,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:40:50,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192176996] [2021-10-24 09:40:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:50,230 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:40:50,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:40:50,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:40:50,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 09:40:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 09:40:50,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:50,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:51,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:40:51,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192176996] [2021-10-24 09:40:51,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192176996] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:40:51,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1901049208] [2021-10-24 09:40:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:51,219 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:40:51,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:40:51,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:40:51,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-24 09:40:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 09:40:51,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:51,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:52,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1901049208] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:40:52,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63273652] [2021-10-24 09:40:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:52,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:40:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:40:52,201 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:40:52,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-24 09:40:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 09:40:52,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:52,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:53,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63273652] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:40:53,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 09:40:53,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-10-24 09:40:53,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618574510] [2021-10-24 09:40:53,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 09:40:53,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:40:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 09:40:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:40:53,012 INFO L87 Difference]: Start difference. First operand 171 states and 246 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2021-10-24 09:40:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:53,614 INFO L93 Difference]: Finished difference Result 566 states and 848 transitions. [2021-10-24 09:40:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 09:40:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 [2021-10-24 09:40:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:53,618 INFO L225 Difference]: With dead ends: 566 [2021-10-24 09:40:53,618 INFO L226 Difference]: Without dead ends: 431 [2021-10-24 09:40:53,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 396 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:40:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-10-24 09:40:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2021-10-24 09:40:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.4521531100478469) internal successors, (607), 418 states have internal predecessors, (607), 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) [2021-10-24 09:40:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 607 transitions. [2021-10-24 09:40:53,640 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 607 transitions. Word has length 68 [2021-10-24 09:40:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:53,641 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 607 transitions. [2021-10-24 09:40:53,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2021-10-24 09:40:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 607 transitions. [2021-10-24 09:40:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-24 09:40:53,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:53,644 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] [2021-10-24 09:40:53,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 09:40:53,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-24 09:40:54,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-24 09:40:54,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:40:54,266 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2031900493, now seen corresponding path program 1 times [2021-10-24 09:40:54,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:40:54,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663410526] [2021-10-24 09:40:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:54,267 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:40:54,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:40:54,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:40:54,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 09:40:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:40:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:54,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:54,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:40:54,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663410526] [2021-10-24 09:40:54,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663410526] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:40:54,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:40:54,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 09:40:54,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436777398] [2021-10-24 09:40:54,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:40:54,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:40:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:40:54,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:54,999 INFO L87 Difference]: Start difference. First operand 419 states and 607 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) [2021-10-24 09:40:55,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:55,036 INFO L93 Difference]: Finished difference Result 927 states and 1364 transitions. [2021-10-24 09:40:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:40:55,037 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 [2021-10-24 09:40:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:55,040 INFO L225 Difference]: With dead ends: 927 [2021-10-24 09:40:55,041 INFO L226 Difference]: Without dead ends: 574 [2021-10-24 09:40:55,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-10-24 09:40:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 572. [2021-10-24 09:40:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 1.4623467600700526) internal successors, (835), 571 states have internal predecessors, (835), 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) [2021-10-24 09:40:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 835 transitions. [2021-10-24 09:40:55,063 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 835 transitions. Word has length 68 [2021-10-24 09:40:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:55,064 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 835 transitions. [2021-10-24 09:40:55,064 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) [2021-10-24 09:40:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 835 transitions. [2021-10-24 09:40:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-24 09:40:55,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:55,066 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] [2021-10-24 09:40:55,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 09:40:55,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:40:55,278 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:55,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:55,279 INFO L82 PathProgramCache]: Analyzing trace with hash -875025075, now seen corresponding path program 1 times [2021-10-24 09:40:55,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:40:55,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446603026] [2021-10-24 09:40:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:55,281 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:40:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:40:55,282 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:40:55,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 09:40:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:40:55,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:55,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:56,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:40:56,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446603026] [2021-10-24 09:40:56,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446603026] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:40:56,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:40:56,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 09:40:56,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080242526] [2021-10-24 09:40:56,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:40:56,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:40:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:40:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:56,025 INFO L87 Difference]: Start difference. First operand 572 states and 835 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) [2021-10-24 09:40:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:40:56,067 INFO L93 Difference]: Finished difference Result 576 states and 837 transitions. [2021-10-24 09:40:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:40:56,068 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 [2021-10-24 09:40:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:40:56,071 INFO L225 Difference]: With dead ends: 576 [2021-10-24 09:40:56,071 INFO L226 Difference]: Without dead ends: 419 [2021-10-24 09:40:56,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:40:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-10-24 09:40:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2021-10-24 09:40:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.4375) internal successors, (598), 416 states have internal predecessors, (598), 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) [2021-10-24 09:40:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 598 transitions. [2021-10-24 09:40:56,088 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 598 transitions. Word has length 68 [2021-10-24 09:40:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:40:56,089 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 598 transitions. [2021-10-24 09:40:56,089 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) [2021-10-24 09:40:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 598 transitions. [2021-10-24 09:40:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-24 09:40:56,090 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:40:56,090 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] [2021-10-24 09:40:56,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 09:40:56,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:40:56,304 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:40:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:40:56,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1614503887, now seen corresponding path program 1 times [2021-10-24 09:40:56,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:40:56,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651585440] [2021-10-24 09:40:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:56,305 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:40:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:40:56,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:40:56,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 09:40:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 09:40:56,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 09:40:57,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 09:40:57,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:40:57,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651585440] [2021-10-24 09:40:57,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651585440] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:40:57,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1566982586] [2021-10-24 09:40:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:57,372 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:40:57,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:40:57,376 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:40:57,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-24 09:40:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 09:40:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 09:40:58,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 09:40:58,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1566982586] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:40:58,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064407470] [2021-10-24 09:40:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:40:58,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:40:58,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:40:58,503 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:40:58,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-24 09:40:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:40:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 09:40:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:40:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:59,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:40:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-24 09:40:59,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064407470] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:40:59,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 09:40:59,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 4, 4] total 14 [2021-10-24 09:40:59,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559612340] [2021-10-24 09:40:59,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-24 09:40:59,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:40:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-24 09:40:59,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-24 09:40:59,527 INFO L87 Difference]: Start difference. First operand 417 states and 598 transitions. Second operand has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 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) [2021-10-24 09:41:01,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:41:01,475 INFO L93 Difference]: Finished difference Result 1191 states and 1790 transitions. [2021-10-24 09:41:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-24 09:41:01,476 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 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 [2021-10-24 09:41:01,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:41:01,481 INFO L225 Difference]: With dead ends: 1191 [2021-10-24 09:41:01,482 INFO L226 Difference]: Without dead ends: 831 [2021-10-24 09:41:01,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-10-24 09:41:01,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-10-24 09:41:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 554. [2021-10-24 09:41:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.3905967450271248) internal successors, (769), 553 states have internal predecessors, (769), 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) [2021-10-24 09:41:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 769 transitions. [2021-10-24 09:41:01,517 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 769 transitions. Word has length 68 [2021-10-24 09:41:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:41:01,518 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 769 transitions. [2021-10-24 09:41:01,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 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) [2021-10-24 09:41:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 769 transitions. [2021-10-24 09:41:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-24 09:41:01,519 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:41:01,520 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, 1] [2021-10-24 09:41:01,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-24 09:41:01,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-10-24 09:41:01,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-24 09:41:02,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:41:02,127 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:41:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:41:02,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1844660206, now seen corresponding path program 1 times [2021-10-24 09:41:02,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:41:02,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630705742] [2021-10-24 09:41:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:41:02,129 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:41:02,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:41:02,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:41:02,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-24 09:41:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:41:02,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:41:02,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:41:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-24 09:41:02,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:41:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-24 09:41:02,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:41:02,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630705742] [2021-10-24 09:41:02,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630705742] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:41:02,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:41:02,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 09:41:02,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500426033] [2021-10-24 09:41:02,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:41:02,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:41:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:41:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:41:02,935 INFO L87 Difference]: Start difference. First operand 554 states and 769 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) [2021-10-24 09:41:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:41:03,091 INFO L93 Difference]: Finished difference Result 1090 states and 1537 transitions. [2021-10-24 09:41:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:41:03,091 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 85 [2021-10-24 09:41:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:41:03,096 INFO L225 Difference]: With dead ends: 1090 [2021-10-24 09:41:03,096 INFO L226 Difference]: Without dead ends: 602 [2021-10-24 09:41:03,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:41:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-10-24 09:41:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 596. [2021-10-24 09:41:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 1.3798319327731092) internal successors, (821), 595 states have internal predecessors, (821), 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) [2021-10-24 09:41:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 821 transitions. [2021-10-24 09:41:03,141 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 821 transitions. Word has length 85 [2021-10-24 09:41:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:41:03,141 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 821 transitions. [2021-10-24 09:41:03,142 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) [2021-10-24 09:41:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 821 transitions. [2021-10-24 09:41:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-24 09:41:03,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:41:03,147 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] [2021-10-24 09:41:03,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-24 09:41:03,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:41:03,359 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:41:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:41:03,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2022672797, now seen corresponding path program 1 times [2021-10-24 09:41:03,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:41:03,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162677379] [2021-10-24 09:41:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:41:03,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:41:03,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:41:03,362 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:41:03,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-24 09:41:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:41:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 09:41:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:41:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-24 09:41:04,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:41:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-24 09:41:04,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:41:04,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162677379] [2021-10-24 09:41:04,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162677379] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:41:04,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:41:04,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-24 09:41:04,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797603076] [2021-10-24 09:41:04,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 09:41:04,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:41:04,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 09:41:04,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:41:04,370 INFO L87 Difference]: Start difference. First operand 596 states and 821 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-10-24 09:41:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:41:04,464 INFO L93 Difference]: Finished difference Result 1702 states and 2351 transitions. [2021-10-24 09:41:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:41:04,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 [2021-10-24 09:41:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:41:04,473 INFO L225 Difference]: With dead ends: 1702 [2021-10-24 09:41:04,473 INFO L226 Difference]: Without dead ends: 1172 [2021-10-24 09:41:04,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:41:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-10-24 09:41:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1168. [2021-10-24 09:41:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 1.3693230505569838) internal successors, (1598), 1167 states have internal predecessors, (1598), 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) [2021-10-24 09:41:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1598 transitions. [2021-10-24 09:41:04,522 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1598 transitions. Word has length 104 [2021-10-24 09:41:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:41:04,523 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1598 transitions. [2021-10-24 09:41:04,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-10-24 09:41:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1598 transitions. [2021-10-24 09:41:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-24 09:41:04,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:41:04,526 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] [2021-10-24 09:41:04,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-24 09:41:04,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:41:04,740 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:41:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:41:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1888659291, now seen corresponding path program 1 times [2021-10-24 09:41:04,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:41:04,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346453624] [2021-10-24 09:41:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:41:04,741 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:41:04,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:41:04,742 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:41:04,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-24 09:41:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:41:05,243 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 09:41:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:41:05,587 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 09:41:05,587 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 09:41:05,588 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:41:05,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-24 09:41:05,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:41:05,804 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:41:05,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:41:05 BoogieIcfgContainer [2021-10-24 09:41:05,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:41:05,963 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:41:05,964 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:41:05,964 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:41:05,964 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:40:46" (3/4) ... [2021-10-24 09:41:05,967 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 09:41:06,117 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 09:41:06,118 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:41:06,119 INFO L168 Benchmark]: Toolchain (without parser) took 20990.10 ms. Allocated memory was 69.2 MB in the beginning and 125.8 MB in the end (delta: 56.6 MB). Free memory was 53.5 MB in the beginning and 71.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. [2021-10-24 09:41:06,120 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 69.2 MB. Free memory was 50.5 MB in the beginning and 50.4 MB in the end (delta: 60.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:41:06,121 INFO L168 Benchmark]: CACSL2BoogieTranslator took 543.45 ms. Allocated memory is still 69.2 MB. Free memory was 53.4 MB in the beginning and 50.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:41:06,121 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.08 ms. Allocated memory is still 69.2 MB. Free memory was 50.0 MB in the beginning and 47.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 09:41:06,122 INFO L168 Benchmark]: Boogie Preprocessor took 45.08 ms. Allocated memory is still 69.2 MB. Free memory was 47.3 MB in the beginning and 45.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:41:06,123 INFO L168 Benchmark]: RCFGBuilder took 859.59 ms. Allocated memory is still 69.2 MB. Free memory was 45.2 MB in the beginning and 44.7 MB in the end (delta: 568.9 kB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2021-10-24 09:41:06,123 INFO L168 Benchmark]: TraceAbstraction took 19327.89 ms. Allocated memory was 69.2 MB in the beginning and 125.8 MB in the end (delta: 56.6 MB). Free memory was 44.0 MB in the beginning and 83.6 MB in the end (delta: -39.6 MB). Peak memory consumption was 78.3 MB. Max. memory is 16.1 GB. [2021-10-24 09:41:06,123 INFO L168 Benchmark]: Witness Printer took 154.61 ms. Allocated memory is still 125.8 MB. Free memory was 83.6 MB in the beginning and 71.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-24 09:41:06,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 69.2 MB. Free memory was 50.5 MB in the beginning and 50.4 MB in the end (delta: 60.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 543.45 ms. Allocated memory is still 69.2 MB. Free memory was 53.4 MB in the beginning and 50.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.08 ms. Allocated memory is still 69.2 MB. Free memory was 50.0 MB in the beginning and 47.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.08 ms. Allocated memory is still 69.2 MB. Free memory was 47.3 MB in the beginning and 45.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 859.59 ms. Allocated memory is still 69.2 MB. Free memory was 45.2 MB in the beginning and 44.7 MB in the end (delta: 568.9 kB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19327.89 ms. Allocated memory was 69.2 MB in the beginning and 125.8 MB in the end (delta: 56.6 MB). Free memory was 44.0 MB in the beginning and 83.6 MB in the end (delta: -39.6 MB). Peak memory consumption was 78.3 MB. Max. memory is 16.1 GB. * Witness Printer took 154.61 ms. Allocated memory is still 125.8 MB. Free memory was 83.6 MB in the beginning and 71.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 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: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L625] 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 ; [L65] int ag_Z ; [L66] int __retres60 ; [L69] s__state = 12292 [L70] blastFlag = 0 [L71] tmp = __VERIFIER_nondet_int() [L72] cb = 0 [L73] ret = -1 [L74] skip = 0 [L75] tmp___0 = 0 [L76] COND TRUE s__info_callback != 0 [L77] cb = s__info_callback [L85] s__in_handshake = s__in_handshake + 1 [L86] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(\read(s__hit)) [L98] ag_Z = 48 [L101] COND TRUE 1 [L103] state = s__state [L104] COND TRUE s__state == 12292 [L207] s__new_session = 1 [L208] s__state = 4096 [L209] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L214] s__server = 0 [L215] COND TRUE cb != 0 [L220] COND FALSE !(s__version + 65280 != 768) [L226] s__type = 4096 [L227] COND FALSE !((unsigned long )s__init_buf___0 == (unsigned long )((void *)0)) [L245] COND FALSE !(! tmp___4) [L251] COND FALSE !(! tmp___5) [L257] s__state = 4368 [L258] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L259] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND TRUE s__state == 4368 [L263] s__shutdown = 0 [L264] ret = __VERIFIER_nondet_int() [L265] COND TRUE blastFlag == 0 [L266] blastFlag = 1 [L270] COND FALSE !(ret <= 0) [L275] s__state = 4384 [L276] ag_X = s__state - 32 [L277] s__init_num = 0 [L278] COND TRUE (unsigned long )s__bbio != (unsigned long )s__wbio [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND TRUE s__state == 4384 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L296] COND FALSE !(ret <= 0) [L301] s__state = ag_X [L302] COND FALSE !(\read(s__hit)) [L305] s__state = s__state | ag_Z [L307] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND FALSE !(s__state == 4384) [L128] COND FALSE !(s__state == 4385) [L131] COND TRUE s__state == 4400 [L311] COND TRUE (unsigned long )s__s3__tmp__new_cipher__algorithms + 256UL [L312] skip = 1 [L326] s__state = 4416 [L327] s__init_num = 0 [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND FALSE !(s__state == 4384) [L128] COND FALSE !(s__state == 4385) [L131] COND FALSE !(s__state == 4400) [L134] COND FALSE !(s__state == 4401) [L137] COND TRUE s__state == 4416 [L331] ret = __VERIFIER_nondet_int() [L332] COND FALSE !(blastFlag == 3) [L337] COND FALSE !(ret <= 0) [L342] s__state = 4432 [L343] s__init_num = 0 [L344] COND FALSE !(! tmp___6) [L574] COND FALSE !(! s__s3__tmp__reuse_message) [L603] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 4096) [L113] COND FALSE !(s__state == 20480) [L116] COND FALSE !(s__state == 4099) [L119] COND FALSE !(s__state == 4368) [L122] COND FALSE !(s__state == 4369) [L125] COND FALSE !(s__state == 4384) [L128] COND FALSE !(s__state == 4385) [L131] COND FALSE !(s__state == 4400) [L134] COND FALSE !(s__state == 4401) [L137] COND FALSE !(s__state == 4416) [L140] COND FALSE !(s__state == 4417) [L143] COND TRUE s__state == 4432 [L353] ret = __VERIFIER_nondet_int() [L354] COND TRUE blastFlag <= 5 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 126 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19090.4ms, OverallIterations: 11, TraceHistogramMax: 6, EmptinessCheckTime: 35.7ms, AutomataDifference: 3602.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1815 SDtfs, 2240 SDslu, 2490 SDs, 0 SdLazy, 2257 SolverSat, 386 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2261.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1783 GetRequests, 1740 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 453.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1168occurred in iteration=10, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 293.0ms AutomataMinimizationTime, 10 MinimizatonAttempts, 310 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 276.0ms SsaConstructionTime, 724.8ms SatisfiabilityAnalysisTime, 7038.8ms InterpolantComputationTime, 1001 NumberOfCodeBlocks, 1001 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1766 ConstructedInterpolants, 236 QuantifiedInterpolants, 5445 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1883 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 28 InterpolantComputations, 16 PerfectInterpolantSequences, 854/1156 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! [2021-10-24 09:41:06,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28d0bc1-432e-4b39-ac11-9094f9d452ce/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...