./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39038350569cc1983dc9a58167271fc220c66f89 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39038350569cc1983dc9a58167271fc220c66f89 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:44:15,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:44:15,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:44:15,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:44:15,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:44:15,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:44:15,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:44:15,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:44:15,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:44:15,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:44:15,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:44:15,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:44:15,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:44:15,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:44:15,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:44:15,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:44:15,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:44:15,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:44:15,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:44:15,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:44:15,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:44:15,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:44:15,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:44:15,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:44:15,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:44:15,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:44:15,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:44:15,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:44:15,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:44:15,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:44:15,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:44:15,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:44:15,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:44:15,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:44:15,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:44:15,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:44:15,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:44:15,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:44:15,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:44:15,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:44:15,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:44:15,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:44:15,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:44:15,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:44:15,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:44:15,980 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:44:15,980 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:44:15,980 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:44:15,980 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:44:15,981 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:44:15,981 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:44:15,981 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:44:15,982 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:44:15,982 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:44:15,983 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:44:15,983 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:44:15,983 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:44:15,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:44:15,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:44:15,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:44:15,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:44:15,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:44:15,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:44:15,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:44:15,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:44:15,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:44:15,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:44:15,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:44:15,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:44:15,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:44:15,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:44:15,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:44:15,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:15,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:44:15,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:44:15,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:44:15,988 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:44:15,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:44:15,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:44:15,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:44:15,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:44:15,989 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_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39038350569cc1983dc9a58167271fc220c66f89 [2021-10-13 06:44:16,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:44:16,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:44:16,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:44:16,280 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:44:16,280 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:44:16,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c [2021-10-13 06:44:16,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data/943cec53b/9196976d1a2343859cd0cd6f21f2f4cb/FLAG7f28baebc [2021-10-13 06:44:16,862 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:44:16,863 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c [2021-10-13 06:44:16,874 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data/943cec53b/9196976d1a2343859cd0cd6f21f2f4cb/FLAG7f28baebc [2021-10-13 06:44:17,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data/943cec53b/9196976d1a2343859cd0cd6f21f2f4cb [2021-10-13 06:44:17,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:44:17,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:44:17,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:17,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:44:17,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:44:17,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6964ec5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17, skipping insertion in model container [2021-10-13 06:44:17,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:44:17,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:44:17,513 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_3f980071-c597-4427-be19-6f1de69c1884/sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c[34966,34979] [2021-10-13 06:44:17,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:17,528 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:44:17,576 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_3f980071-c597-4427-be19-6f1de69c1884/sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c[34966,34979] [2021-10-13 06:44:17,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:17,606 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:44:17,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17 WrapperNode [2021-10-13 06:44:17,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:17,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:17,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:44:17,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:44:17,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:17,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:44:17,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:44:17,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:44:17,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:44:17,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:44:17,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:44:17,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:44:17,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (1/1) ... [2021-10-13 06:44:17,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:44:17,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:44:17,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:44:17,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:44:17,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:44:17,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:44:17,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:44:17,982 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 06:44:18,479 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-13 06:44:18,480 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-13 06:44:18,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:44:18,946 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 06:44:18,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:44:18 BoogieIcfgContainer [2021-10-13 06:44:18,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:44:18,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:44:18,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:44:18,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:44:18,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:44:17" (1/3) ... [2021-10-13 06:44:18,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5178ee67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:44:18, skipping insertion in model container [2021-10-13 06:44:18,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:17" (2/3) ... [2021-10-13 06:44:18,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5178ee67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:44:18, skipping insertion in model container [2021-10-13 06:44:18,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:44:18" (3/3) ... [2021-10-13 06:44:18,966 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_1.cil-2.c [2021-10-13 06:44:18,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:44:18,973 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:44:19,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:44:19,051 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 06:44:19,051 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:44:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 06:44:19,086 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:19,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:19,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:19,096 INFO L82 PathProgramCache]: Analyzing trace with hash -852679889, now seen corresponding path program 1 times [2021-10-13 06:44:19,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:19,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911467553] [2021-10-13 06:44:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:19,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:44:19,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:19,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911467553] [2021-10-13 06:44:19,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911467553] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:19,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:19,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:19,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192462265] [2021-10-13 06:44:19,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:19,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:19,454 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:19,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:19,636 INFO L93 Difference]: Finished difference Result 196 states and 338 transitions. [2021-10-13 06:44:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:19,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 06:44:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:19,650 INFO L225 Difference]: With dead ends: 196 [2021-10-13 06:44:19,651 INFO L226 Difference]: Without dead ends: 107 [2021-10-13 06:44:19,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-13 06:44:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2021-10-13 06:44:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.5346534653465347) internal successors, (155), 101 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 155 transitions. [2021-10-13 06:44:19,701 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 155 transitions. Word has length 19 [2021-10-13 06:44:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:19,702 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 155 transitions. [2021-10-13 06:44:19,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 155 transitions. [2021-10-13 06:44:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 06:44:19,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:19,704 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] [2021-10-13 06:44:19,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:44:19,705 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash -667780022, now seen corresponding path program 1 times [2021-10-13 06:44:19,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:19,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229051444] [2021-10-13 06:44:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:19,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:44:19,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:19,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229051444] [2021-10-13 06:44:19,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229051444] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:19,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:19,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:19,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884252056] [2021-10-13 06:44:19,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:19,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:19,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:19,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:19,770 INFO L87 Difference]: Start difference. First operand 102 states and 155 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:19,944 INFO L93 Difference]: Finished difference Result 230 states and 354 transitions. [2021-10-13 06:44:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 20 [2021-10-13 06:44:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:19,954 INFO L225 Difference]: With dead ends: 230 [2021-10-13 06:44:19,955 INFO L226 Difference]: Without dead ends: 129 [2021-10-13 06:44:19,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-13 06:44:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-10-13 06:44:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.5772357723577235) internal successors, (194), 123 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 194 transitions. [2021-10-13 06:44:20,001 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 194 transitions. Word has length 20 [2021-10-13 06:44:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:20,001 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 194 transitions. [2021-10-13 06:44:20,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 194 transitions. [2021-10-13 06:44:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 06:44:20,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:20,015 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:20,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 06:44:20,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1801692308, now seen corresponding path program 1 times [2021-10-13 06:44:20,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:20,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040623961] [2021-10-13 06:44:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:20,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:44:20,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:20,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040623961] [2021-10-13 06:44:20,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040623961] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:20,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:20,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:20,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438012078] [2021-10-13 06:44:20,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:20,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:20,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:20,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:20,099 INFO L87 Difference]: Start difference. First operand 124 states and 194 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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) [2021-10-13 06:44:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:20,262 INFO L93 Difference]: Finished difference Result 268 states and 423 transitions. [2021-10-13 06:44:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 [2021-10-13 06:44:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:20,265 INFO L225 Difference]: With dead ends: 268 [2021-10-13 06:44:20,265 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 06:44:20,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 06:44:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-10-13 06:44:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.591549295774648) internal successors, (226), 142 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 226 transitions. [2021-10-13 06:44:20,288 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 226 transitions. Word has length 37 [2021-10-13 06:44:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:20,288 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 226 transitions. [2021-10-13 06:44:20,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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) [2021-10-13 06:44:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 226 transitions. [2021-10-13 06:44:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 06:44:20,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:20,291 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:20,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 06:44:20,292 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:20,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:20,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2022205839, now seen corresponding path program 1 times [2021-10-13 06:44:20,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:20,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714057828] [2021-10-13 06:44:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:20,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:44:20,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:20,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714057828] [2021-10-13 06:44:20,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714057828] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:20,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:20,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:20,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829788375] [2021-10-13 06:44:20,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:20,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:20,360 INFO L87 Difference]: Start difference. First operand 143 states and 226 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:20,487 INFO L93 Difference]: Finished difference Result 287 states and 453 transitions. [2021-10-13 06:44:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:20,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 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 38 [2021-10-13 06:44:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:20,489 INFO L225 Difference]: With dead ends: 287 [2021-10-13 06:44:20,489 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 06:44:20,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 06:44:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-10-13 06:44:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5774647887323943) internal successors, (224), 142 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) [2021-10-13 06:44:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 224 transitions. [2021-10-13 06:44:20,501 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 224 transitions. Word has length 38 [2021-10-13 06:44:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:20,502 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 224 transitions. [2021-10-13 06:44:20,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 224 transitions. [2021-10-13 06:44:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 06:44:20,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:20,505 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:20,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 06:44:20,506 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1920308223, now seen corresponding path program 1 times [2021-10-13 06:44:20,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:20,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614413853] [2021-10-13 06:44:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:20,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:44:20,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:20,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614413853] [2021-10-13 06:44:20,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614413853] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:20,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:20,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:20,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557326758] [2021-10-13 06:44:20,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:20,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:20,560 INFO L87 Difference]: Start difference. First operand 143 states and 224 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:20,685 INFO L93 Difference]: Finished difference Result 305 states and 481 transitions. [2021-10-13 06:44:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 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 52 [2021-10-13 06:44:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:20,688 INFO L225 Difference]: With dead ends: 305 [2021-10-13 06:44:20,688 INFO L226 Difference]: Without dead ends: 163 [2021-10-13 06:44:20,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-13 06:44:20,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-10-13 06:44:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.578616352201258) internal successors, (251), 159 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 251 transitions. [2021-10-13 06:44:20,709 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 251 transitions. Word has length 52 [2021-10-13 06:44:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:20,710 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 251 transitions. [2021-10-13 06:44:20,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 251 transitions. [2021-10-13 06:44:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-13 06:44:20,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:20,719 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:20,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 06:44:20,720 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:20,720 INFO L82 PathProgramCache]: Analyzing trace with hash 807031044, now seen corresponding path program 1 times [2021-10-13 06:44:20,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:20,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703946367] [2021-10-13 06:44:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:20,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 06:44:20,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:20,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703946367] [2021-10-13 06:44:20,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703946367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:20,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:20,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:20,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636455706] [2021-10-13 06:44:20,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:20,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:20,788 INFO L87 Difference]: Start difference. First operand 160 states and 251 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:20,890 INFO L93 Difference]: Finished difference Result 322 states and 505 transitions. [2021-10-13 06:44:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 53 [2021-10-13 06:44:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:20,892 INFO L225 Difference]: With dead ends: 322 [2021-10-13 06:44:20,892 INFO L226 Difference]: Without dead ends: 163 [2021-10-13 06:44:20,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-13 06:44:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-10-13 06:44:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.559748427672956) internal successors, (248), 159 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 248 transitions. [2021-10-13 06:44:20,905 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 248 transitions. Word has length 53 [2021-10-13 06:44:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:20,907 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 248 transitions. [2021-10-13 06:44:20,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 248 transitions. [2021-10-13 06:44:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 06:44:20,909 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:20,909 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:20,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 06:44:20,910 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:20,910 INFO L82 PathProgramCache]: Analyzing trace with hash -688942719, now seen corresponding path program 1 times [2021-10-13 06:44:20,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:20,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046573168] [2021-10-13 06:44:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:20,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:44:21,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:21,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046573168] [2021-10-13 06:44:21,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046573168] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:21,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:21,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:21,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560664519] [2021-10-13 06:44:21,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:21,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:21,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:21,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,015 INFO L87 Difference]: Start difference. First operand 160 states and 248 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:21,152 INFO L93 Difference]: Finished difference Result 358 states and 562 transitions. [2021-10-13 06:44:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 56 [2021-10-13 06:44:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:21,154 INFO L225 Difference]: With dead ends: 358 [2021-10-13 06:44:21,154 INFO L226 Difference]: Without dead ends: 198 [2021-10-13 06:44:21,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-13 06:44:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-10-13 06:44:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.5888324873096447) internal successors, (313), 197 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 313 transitions. [2021-10-13 06:44:21,164 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 313 transitions. Word has length 56 [2021-10-13 06:44:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:21,165 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 313 transitions. [2021-10-13 06:44:21,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 313 transitions. [2021-10-13 06:44:21,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-13 06:44:21,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:21,168 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:21,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 06:44:21,168 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:21,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:21,169 INFO L82 PathProgramCache]: Analyzing trace with hash -726838960, now seen corresponding path program 1 times [2021-10-13 06:44:21,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:21,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502453887] [2021-10-13 06:44:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:21,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-13 06:44:21,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:21,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502453887] [2021-10-13 06:44:21,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502453887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:21,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:21,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:21,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117208296] [2021-10-13 06:44:21,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:21,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,236 INFO L87 Difference]: Start difference. First operand 198 states and 313 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:21,339 INFO L93 Difference]: Finished difference Result 412 states and 653 transitions. [2021-10-13 06:44:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 65 [2021-10-13 06:44:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:21,342 INFO L225 Difference]: With dead ends: 412 [2021-10-13 06:44:21,342 INFO L226 Difference]: Without dead ends: 215 [2021-10-13 06:44:21,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-13 06:44:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-10-13 06:44:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5754716981132075) internal successors, (334), 212 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 334 transitions. [2021-10-13 06:44:21,352 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 334 transitions. Word has length 65 [2021-10-13 06:44:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:21,353 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 334 transitions. [2021-10-13 06:44:21,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 334 transitions. [2021-10-13 06:44:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-13 06:44:21,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:21,354 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:21,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 06:44:21,355 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash 931758347, now seen corresponding path program 1 times [2021-10-13 06:44:21,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:21,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48151656] [2021-10-13 06:44:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:21,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-13 06:44:21,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:21,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48151656] [2021-10-13 06:44:21,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48151656] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:21,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:21,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:21,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624255388] [2021-10-13 06:44:21,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:21,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:21,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,429 INFO L87 Difference]: Start difference. First operand 213 states and 334 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:21,538 INFO L93 Difference]: Finished difference Result 427 states and 669 transitions. [2021-10-13 06:44:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:21,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 66 [2021-10-13 06:44:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:21,540 INFO L225 Difference]: With dead ends: 427 [2021-10-13 06:44:21,540 INFO L226 Difference]: Without dead ends: 215 [2021-10-13 06:44:21,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-13 06:44:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-10-13 06:44:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5518867924528301) internal successors, (329), 212 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 329 transitions. [2021-10-13 06:44:21,552 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 329 transitions. Word has length 66 [2021-10-13 06:44:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:21,552 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 329 transitions. [2021-10-13 06:44:21,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 329 transitions. [2021-10-13 06:44:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-13 06:44:21,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:21,554 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2021-10-13 06:44:21,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 06:44:21,554 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1535978064, now seen corresponding path program 1 times [2021-10-13 06:44:21,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:21,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239224510] [2021-10-13 06:44:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:21,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-10-13 06:44:21,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:21,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239224510] [2021-10-13 06:44:21,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239224510] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:21,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:21,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:21,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641519530] [2021-10-13 06:44:21,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:21,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:21,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:21,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,621 INFO L87 Difference]: Start difference. First operand 213 states and 329 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:21,714 INFO L93 Difference]: Finished difference Result 440 states and 681 transitions. [2021-10-13 06:44:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:21,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 76 [2021-10-13 06:44:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:21,717 INFO L225 Difference]: With dead ends: 440 [2021-10-13 06:44:21,717 INFO L226 Difference]: Without dead ends: 228 [2021-10-13 06:44:21,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-13 06:44:21,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2021-10-13 06:44:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5333333333333334) internal successors, (345), 225 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 345 transitions. [2021-10-13 06:44:21,729 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 345 transitions. Word has length 76 [2021-10-13 06:44:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:21,729 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 345 transitions. [2021-10-13 06:44:21,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 345 transitions. [2021-10-13 06:44:21,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 06:44:21,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:21,731 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2021-10-13 06:44:21,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 06:44:21,731 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:21,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:21,732 INFO L82 PathProgramCache]: Analyzing trace with hash 55163509, now seen corresponding path program 1 times [2021-10-13 06:44:21,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:21,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265727002] [2021-10-13 06:44:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:21,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-10-13 06:44:21,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:21,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265727002] [2021-10-13 06:44:21,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265727002] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:21,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:21,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:44:21,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157307471] [2021-10-13 06:44:21,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:21,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:44:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:21,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,763 INFO L87 Difference]: Start difference. First operand 226 states and 345 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:21,868 INFO L93 Difference]: Finished difference Result 453 states and 691 transitions. [2021-10-13 06:44:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:21,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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 77 [2021-10-13 06:44:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:21,871 INFO L225 Difference]: With dead ends: 453 [2021-10-13 06:44:21,871 INFO L226 Difference]: Without dead ends: 228 [2021-10-13 06:44:21,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-13 06:44:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2021-10-13 06:44:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5066666666666666) internal successors, (339), 225 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 339 transitions. [2021-10-13 06:44:21,883 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 339 transitions. Word has length 77 [2021-10-13 06:44:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:21,884 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 339 transitions. [2021-10-13 06:44:21,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 339 transitions. [2021-10-13 06:44:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-13 06:44:21,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:21,885 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:21,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 06:44:21,886 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1279615619, now seen corresponding path program 1 times [2021-10-13 06:44:21,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:44:21,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102614124] [2021-10-13 06:44:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:21,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:44:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-13 06:44:21,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:44:21,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102614124] [2021-10-13 06:44:21,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102614124] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:44:21,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883231586] [2021-10-13 06:44:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:21,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:44:21,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:44:21,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:44:21,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:44:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:22,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:44:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-13 06:44:22,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-13 06:44:22,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883231586] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:44:22,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1313254852] [2021-10-13 06:44:22,952 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2021-10-13 06:44:22,952 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:44:22,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:44:22,962 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:44:22,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:44:24,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:24,728 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:44:24,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:24,729 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 06:44:24,730 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:44:24,731 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:24,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 06:44:24,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 399 [2021-10-13 06:44:24,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:24,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 06:44:24,852 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:24,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:44:24,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:24,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:44:24,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:44:24,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:24,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:24,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 06:44:24,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:24,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:44:24,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:24,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:44:24,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 06:44:24,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:24,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:44:24,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 06:44:24,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:24,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:44:24,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:24,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:44:24,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-13 06:44:24,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:44:25,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:44:25,172 INFO L180 QuantifierPusher]: treesize reduction 18, result has 98.4 percent of original size [2021-10-13 06:44:25,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1119 [2021-10-13 06:44:25,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-10-13 06:44:25,225 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:1128, output treesize:1119 [2021-10-13 06:44:25,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:25,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-13 06:44:25,448 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_18| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 06:44:25,450 INFO L168 Benchmark]: Toolchain (without parser) took 8223.99 ms. Allocated memory was 119.5 MB in the beginning and 201.3 MB in the end (delta: 81.8 MB). Free memory was 80.3 MB in the beginning and 157.8 MB in the end (delta: -77.5 MB). Peak memory consumption was 116.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:25,451 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 119.5 MB. Free memory is still 97.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:44:25,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.12 ms. Allocated memory is still 119.5 MB. Free memory was 80.1 MB in the beginning and 91.0 MB in the end (delta: -10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:25,451 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.91 ms. Allocated memory is still 119.5 MB. Free memory was 91.0 MB in the beginning and 88.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:25,452 INFO L168 Benchmark]: Boogie Preprocessor took 51.94 ms. Allocated memory is still 119.5 MB. Free memory was 88.2 MB in the beginning and 86.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:25,452 INFO L168 Benchmark]: RCFGBuilder took 1210.75 ms. Allocated memory is still 119.5 MB. Free memory was 86.4 MB in the beginning and 83.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:25,452 INFO L168 Benchmark]: TraceAbstraction took 6493.58 ms. Allocated memory was 119.5 MB in the beginning and 201.3 MB in the end (delta: 81.8 MB). Free memory was 82.9 MB in the beginning and 157.8 MB in the end (delta: -74.9 MB). Peak memory consumption was 118.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:25,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 119.5 MB. Free memory is still 97.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 377.12 ms. Allocated memory is still 119.5 MB. Free memory was 80.1 MB in the beginning and 91.0 MB in the end (delta: -10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 82.91 ms. Allocated memory is still 119.5 MB. Free memory was 91.0 MB in the beginning and 88.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.94 ms. Allocated memory is still 119.5 MB. Free memory was 88.2 MB in the beginning and 86.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1210.75 ms. Allocated memory is still 119.5 MB. Free memory was 86.4 MB in the beginning and 83.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6493.58 ms. Allocated memory was 119.5 MB in the beginning and 201.3 MB in the end (delta: 81.8 MB). Free memory was 82.9 MB in the beginning and 157.8 MB in the end (delta: -74.9 MB). Peak memory consumption was 118.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_18| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_18|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:44:25,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:44:28,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:44:28,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:44:28,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:44:28,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:44:28,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:44:28,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:44:28,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:44:28,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:44:28,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:44:28,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:44:28,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:44:28,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:44:28,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:44:28,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:44:28,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:44:28,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:44:28,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:44:28,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:44:28,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:44:28,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:44:28,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:44:28,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:44:28,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:44:28,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:44:28,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:44:28,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:44:28,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:44:28,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:44:28,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:44:28,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:44:28,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:44:28,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:44:28,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:44:28,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:44:28,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:44:28,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:44:28,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:44:28,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:44:28,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:44:28,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:44:28,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:44:28,212 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:44:28,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:44:28,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:44:28,214 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:44:28,215 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:44:28,215 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:44:28,215 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:44:28,216 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:44:28,216 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:44:28,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:44:28,219 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:44:28,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:44:28,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:44:28,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:44:28,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:44:28,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:44:28,221 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:44:28,221 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:44:28,221 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:44:28,222 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:44:28,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:44:28,222 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:44:28,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:44:28,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:44:28,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:44:28,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:44:28,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:28,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:44:28,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:44:28,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:44:28,225 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:44:28,225 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:44:28,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:44:28,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:44:28,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:44:28,227 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_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39038350569cc1983dc9a58167271fc220c66f89 [2021-10-13 06:44:28,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:44:28,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:44:28,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:44:28,602 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:44:28,602 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:44:28,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c [2021-10-13 06:44:28,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data/b169ea0f9/ce131cc2a93748329d8c754a5227f023/FLAG863a1fc53 [2021-10-13 06:44:29,397 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:44:29,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c [2021-10-13 06:44:29,410 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data/b169ea0f9/ce131cc2a93748329d8c754a5227f023/FLAG863a1fc53 [2021-10-13 06:44:29,692 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/data/b169ea0f9/ce131cc2a93748329d8c754a5227f023 [2021-10-13 06:44:29,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:44:29,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:44:29,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:29,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:44:29,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:44:29,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:29" (1/1) ... [2021-10-13 06:44:29,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@465fd061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:29, skipping insertion in model container [2021-10-13 06:44:29,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:29" (1/1) ... [2021-10-13 06:44:29,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:44:29,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:44:30,091 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_3f980071-c597-4427-be19-6f1de69c1884/sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c[34966,34979] [2021-10-13 06:44:30,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:30,144 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:44:30,249 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_3f980071-c597-4427-be19-6f1de69c1884/sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-2.c[34966,34979] [2021-10-13 06:44:30,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:30,276 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:44:30,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30 WrapperNode [2021-10-13 06:44:30,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:30,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:30,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:44:30,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:44:30,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:30,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:44:30,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:44:30,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:44:30,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:44:30,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:44:30,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:44:30,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:44:30,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (1/1) ... [2021-10-13 06:44:30,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:30,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:44:30,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:44:30,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:44:30,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:44:30,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:44:30,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:44:30,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:44:30,779 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 06:44:31,222 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-13 06:44:31,222 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-13 06:44:31,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:44:31,237 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 06:44:31,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:44:31 BoogieIcfgContainer [2021-10-13 06:44:31,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:44:31,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:44:31,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:44:31,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:44:31,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:44:29" (1/3) ... [2021-10-13 06:44:31,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f361af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:44:31, skipping insertion in model container [2021-10-13 06:44:31,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:30" (2/3) ... [2021-10-13 06:44:31,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f361af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:44:31, skipping insertion in model container [2021-10-13 06:44:31,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:44:31" (3/3) ... [2021-10-13 06:44:31,249 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_1.cil-2.c [2021-10-13 06:44:31,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:44:31,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:44:31,331 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:44:31,343 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 06:44:31,343 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:44:31,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 125 states have (on average 1.72) internal successors, (215), 126 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) [2021-10-13 06:44:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 06:44:31,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:31,401 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:31,402 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:31,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:31,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1457700990, now seen corresponding path program 1 times [2021-10-13 06:44:31,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:31,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772182244] [2021-10-13 06:44:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:31,424 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:31,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:31,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:31,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:44:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:31,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:44:31,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:44:31,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:44:31,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:31,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772182244] [2021-10-13 06:44:31,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772182244] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:31,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:31,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 06:44:31,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825859863] [2021-10-13 06:44:31,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:31,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:31,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:31,898 INFO L87 Difference]: Start difference. First operand has 127 states, 125 states have (on average 1.72) internal successors, (215), 126 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:32,095 INFO L93 Difference]: Finished difference Result 250 states and 425 transitions. [2021-10-13 06:44:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 06:44:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:32,109 INFO L225 Difference]: With dead ends: 250 [2021-10-13 06:44:32,109 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 06:44:32,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 06:44:32,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-13 06:44:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 113 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) [2021-10-13 06:44:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 171 transitions. [2021-10-13 06:44:32,157 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 171 transitions. Word has length 24 [2021-10-13 06:44:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:32,157 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 171 transitions. [2021-10-13 06:44:32,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 171 transitions. [2021-10-13 06:44:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 06:44:32,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:32,160 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] [2021-10-13 06:44:32,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 06:44:32,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:32,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:32,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:32,372 INFO L82 PathProgramCache]: Analyzing trace with hash 561711387, now seen corresponding path program 1 times [2021-10-13 06:44:32,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:32,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409522814] [2021-10-13 06:44:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:32,374 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:32,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:32,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:32,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:44:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:44:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:44:32,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:44:32,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:32,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409522814] [2021-10-13 06:44:32,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409522814] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:32,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:32,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 06:44:32,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068810024] [2021-10-13 06:44:32,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:32,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:32,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:32,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:32,774 INFO L87 Difference]: Start difference. First operand 114 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) [2021-10-13 06:44:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:32,969 INFO L93 Difference]: Finished difference Result 236 states and 358 transitions. [2021-10-13 06:44:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:32,970 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 [2021-10-13 06:44:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:32,976 INFO L225 Difference]: With dead ends: 236 [2021-10-13 06:44:32,976 INFO L226 Difference]: Without dead ends: 132 [2021-10-13 06:44:32,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-13 06:44:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-10-13 06:44:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.4921875) internal successors, (191), 128 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) [2021-10-13 06:44:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 191 transitions. [2021-10-13 06:44:33,015 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 191 transitions. Word has length 37 [2021-10-13 06:44:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:33,016 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 191 transitions. [2021-10-13 06:44:33,016 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) [2021-10-13 06:44:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 191 transitions. [2021-10-13 06:44:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 06:44:33,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:33,021 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] [2021-10-13 06:44:33,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:33,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:33,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:33,240 INFO L82 PathProgramCache]: Analyzing trace with hash 356447844, now seen corresponding path program 1 times [2021-10-13 06:44:33,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:33,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149434615] [2021-10-13 06:44:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:33,241 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:33,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:33,246 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:33,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:44:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:33,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:44:33,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:44:33,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:44:33,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:33,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149434615] [2021-10-13 06:44:33,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149434615] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:33,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:33,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 06:44:33,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112460859] [2021-10-13 06:44:33,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:33,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:33,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:33,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:33,694 INFO L87 Difference]: Start difference. First operand 129 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) [2021-10-13 06:44:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:33,848 INFO L93 Difference]: Finished difference Result 269 states and 404 transitions. [2021-10-13 06:44:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:33,849 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 [2021-10-13 06:44:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:33,851 INFO L225 Difference]: With dead ends: 269 [2021-10-13 06:44:33,851 INFO L226 Difference]: Without dead ends: 150 [2021-10-13 06:44:33,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-13 06:44:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2021-10-13 06:44:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4689655172413794) internal successors, (213), 145 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 213 transitions. [2021-10-13 06:44:33,863 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 213 transitions. Word has length 51 [2021-10-13 06:44:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:33,864 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 213 transitions. [2021-10-13 06:44:33,864 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) [2021-10-13 06:44:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 213 transitions. [2021-10-13 06:44:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-13 06:44:33,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:33,868 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:33,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:34,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:34,080 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1231511209, now seen corresponding path program 1 times [2021-10-13 06:44:34,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:34,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911660240] [2021-10-13 06:44:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:34,082 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:34,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:34,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:34,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 06:44:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:34,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:44:34,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 06:44:34,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 06:44:34,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:34,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911660240] [2021-10-13 06:44:34,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911660240] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:34,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:34,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:44:34,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345244127] [2021-10-13 06:44:34,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:44:34,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:44:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:44:34,631 INFO L87 Difference]: Start difference. First operand 146 states and 213 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:34,881 INFO L93 Difference]: Finished difference Result 353 states and 538 transitions. [2021-10-13 06:44:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:44:34,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-13 06:44:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:34,883 INFO L225 Difference]: With dead ends: 353 [2021-10-13 06:44:34,884 INFO L226 Difference]: Without dead ends: 217 [2021-10-13 06:44:34,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:44:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-13 06:44:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 209. [2021-10-13 06:44:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.4375) internal successors, (299), 208 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 299 transitions. [2021-10-13 06:44:34,905 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 299 transitions. Word has length 68 [2021-10-13 06:44:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:34,908 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 299 transitions. [2021-10-13 06:44:34,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 299 transitions. [2021-10-13 06:44:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-13 06:44:34,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:34,920 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, 1] [2021-10-13 06:44:34,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:35,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:35,143 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash 339337440, now seen corresponding path program 1 times [2021-10-13 06:44:35,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:35,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019236444] [2021-10-13 06:44:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:35,145 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:35,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:35,147 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:35,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:44:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:35,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:44:35,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 06:44:35,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 06:44:35,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:35,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019236444] [2021-10-13 06:44:35,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019236444] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:35,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:35,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 06:44:35,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982011301] [2021-10-13 06:44:35,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:35,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:35,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:35,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:35,692 INFO L87 Difference]: Start difference. First operand 209 states and 299 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:35,806 INFO L93 Difference]: Finished difference Result 431 states and 624 transitions. [2021-10-13 06:44:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 69 [2021-10-13 06:44:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:35,817 INFO L225 Difference]: With dead ends: 431 [2021-10-13 06:44:35,818 INFO L226 Difference]: Without dead ends: 232 [2021-10-13 06:44:35,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-10-13 06:44:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2021-10-13 06:44:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.422907488986784) internal successors, (323), 227 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 323 transitions. [2021-10-13 06:44:35,847 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 323 transitions. Word has length 69 [2021-10-13 06:44:35,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:35,849 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 323 transitions. [2021-10-13 06:44:35,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 323 transitions. [2021-10-13 06:44:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-13 06:44:35,852 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:35,852 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] [2021-10-13 06:44:35,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:36,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:36,064 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:36,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2099447754, now seen corresponding path program 1 times [2021-10-13 06:44:36,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:36,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041242267] [2021-10-13 06:44:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:36,065 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:36,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:36,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 06:44:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:44:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-13 06:44:36,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-13 06:44:36,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:36,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041242267] [2021-10-13 06:44:36,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041242267] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:36,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:36,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 06:44:36,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123459039] [2021-10-13 06:44:36,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:36,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:36,659 INFO L87 Difference]: Start difference. First operand 228 states and 323 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:36,783 INFO L93 Difference]: Finished difference Result 470 states and 674 transitions. [2021-10-13 06:44:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:36,783 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 [2021-10-13 06:44:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:36,785 INFO L225 Difference]: With dead ends: 470 [2021-10-13 06:44:36,785 INFO L226 Difference]: Without dead ends: 252 [2021-10-13 06:44:36,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-13 06:44:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-10-13 06:44:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.407258064516129) internal successors, (349), 248 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 349 transitions. [2021-10-13 06:44:36,795 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 349 transitions. Word has length 85 [2021-10-13 06:44:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:36,796 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 349 transitions. [2021-10-13 06:44:36,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:36,796 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 349 transitions. [2021-10-13 06:44:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-13 06:44:36,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:36,798 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:36,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:37,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:37,018 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1810291289, now seen corresponding path program 1 times [2021-10-13 06:44:37,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:37,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093354110] [2021-10-13 06:44:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:37,020 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:37,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:37,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:37,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 06:44:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:44:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 06:44:37,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 06:44:37,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:37,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093354110] [2021-10-13 06:44:37,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093354110] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:37,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:37,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:44:37,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292300044] [2021-10-13 06:44:37,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:44:37,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:37,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:44:37,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:44:37,760 INFO L87 Difference]: Start difference. First operand 249 states and 349 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) [2021-10-13 06:44:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:37,831 INFO L93 Difference]: Finished difference Result 749 states and 1048 transitions. [2021-10-13 06:44:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:44:37,833 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 [2021-10-13 06:44:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:37,837 INFO L225 Difference]: With dead ends: 749 [2021-10-13 06:44:37,838 INFO L226 Difference]: Without dead ends: 510 [2021-10-13 06:44:37,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:44:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-10-13 06:44:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-10-13 06:44:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.387033398821218) internal successors, (706), 509 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 706 transitions. [2021-10-13 06:44:37,857 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 706 transitions. Word has length 104 [2021-10-13 06:44:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:37,857 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 706 transitions. [2021-10-13 06:44:37,858 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) [2021-10-13 06:44:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 706 transitions. [2021-10-13 06:44:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-13 06:44:37,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:37,860 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:37,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:38,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:38,075 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:38,076 INFO L82 PathProgramCache]: Analyzing trace with hash 17269863, now seen corresponding path program 1 times [2021-10-13 06:44:38,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:38,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689433492] [2021-10-13 06:44:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:38,076 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:38,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:38,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:38,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:44:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:44:38,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 06:44:38,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 06:44:38,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:38,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689433492] [2021-10-13 06:44:38,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689433492] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:38,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:38,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 06:44:38,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490921249] [2021-10-13 06:44:38,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:38,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:38,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:38,787 INFO L87 Difference]: Start difference. First operand 510 states and 706 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:38,833 INFO L93 Difference]: Finished difference Result 1031 states and 1426 transitions. [2021-10-13 06:44:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:38,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-10-13 06:44:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:38,838 INFO L225 Difference]: With dead ends: 1031 [2021-10-13 06:44:38,839 INFO L226 Difference]: Without dead ends: 531 [2021-10-13 06:44:38,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:38,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-10-13 06:44:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-10-13 06:44:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.3830188679245283) internal successors, (733), 530 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:38,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 733 transitions. [2021-10-13 06:44:38,873 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 733 transitions. Word has length 104 [2021-10-13 06:44:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:38,875 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 733 transitions. [2021-10-13 06:44:38,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 733 transitions. [2021-10-13 06:44:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-13 06:44:38,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:38,877 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:38,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:39,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:39,090 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:39,091 INFO L82 PathProgramCache]: Analyzing trace with hash 44335465, now seen corresponding path program 1 times [2021-10-13 06:44:39,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:39,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847953147] [2021-10-13 06:44:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:39,093 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:39,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:39,094 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:39,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 06:44:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:44:39,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:44:39,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:44:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-13 06:44:39,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:44:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-13 06:44:39,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:44:39,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847953147] [2021-10-13 06:44:39,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847953147] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:44:39,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:44:39,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 06:44:39,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176651317] [2021-10-13 06:44:39,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:44:40,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:44:40,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:44:40,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:40,001 INFO L87 Difference]: Start difference. First operand 531 states and 733 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:44:40,031 INFO L93 Difference]: Finished difference Result 1079 states and 1487 transitions. [2021-10-13 06:44:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:44:40,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-10-13 06:44:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:44:40,035 INFO L225 Difference]: With dead ends: 1079 [2021-10-13 06:44:40,036 INFO L226 Difference]: Without dead ends: 558 [2021-10-13 06:44:40,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:44:40,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-10-13 06:44:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-10-13 06:44:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.377019748653501) internal successors, (767), 557 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 767 transitions. [2021-10-13 06:44:40,057 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 767 transitions. Word has length 104 [2021-10-13 06:44:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:44:40,057 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 767 transitions. [2021-10-13 06:44:40,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:44:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 767 transitions. [2021-10-13 06:44:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-13 06:44:40,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:44:40,059 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:44:40,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:40,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:40,271 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:44:40,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:44:40,272 INFO L82 PathProgramCache]: Analyzing trace with hash -492994255, now seen corresponding path program 1 times [2021-10-13 06:44:40,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:44:40,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116757777] [2021-10-13 06:44:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:44:40,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:44:40,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:44:40,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:44:40,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 06:44:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:44:40,620 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 06:44:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:44:40,920 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 06:44:40,920 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 06:44:40,921 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:44:40,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:44:41,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:44:41,141 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:44:41,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:44:41 BoogieIcfgContainer [2021-10-13 06:44:41,252 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 06:44:41,253 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 06:44:41,253 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 06:44:41,253 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 06:44:41,254 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:44:31" (3/4) ... [2021-10-13 06:44:41,255 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 06:44:41,347 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 06:44:41,347 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 06:44:41,349 INFO L168 Benchmark]: Toolchain (without parser) took 11651.84 ms. Allocated memory was 60.8 MB in the beginning and 96.5 MB in the end (delta: 35.7 MB). Free memory was 38.1 MB in the beginning and 49.7 MB in the end (delta: -11.6 MB). Peak memory consumption was 25.8 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:41,349 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 44.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:44:41,350 INFO L168 Benchmark]: CACSL2BoogieTranslator took 566.06 ms. Allocated memory is still 60.8 MB. Free memory was 37.8 MB in the beginning and 40.4 MB in the end (delta: -2.6 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:41,350 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.27 ms. Allocated memory is still 60.8 MB. Free memory was 40.2 MB in the beginning and 37.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:41,350 INFO L168 Benchmark]: Boogie Preprocessor took 64.60 ms. Allocated memory is still 60.8 MB. Free memory was 37.8 MB in the beginning and 35.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:41,351 INFO L168 Benchmark]: RCFGBuilder took 787.51 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 35.7 MB in the beginning and 41.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:41,351 INFO L168 Benchmark]: TraceAbstraction took 10010.49 ms. Allocated memory was 75.5 MB in the beginning and 96.5 MB in the end (delta: 21.0 MB). Free memory was 41.0 MB in the beginning and 60.7 MB in the end (delta: -19.7 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:41,352 INFO L168 Benchmark]: Witness Printer took 94.25 ms. Allocated memory is still 96.5 MB. Free memory was 60.7 MB in the beginning and 49.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:44:41,354 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 44.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 566.06 ms. Allocated memory is still 60.8 MB. Free memory was 37.8 MB in the beginning and 40.4 MB in the end (delta: -2.6 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.27 ms. Allocated memory is still 60.8 MB. Free memory was 40.2 MB in the beginning and 37.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.60 ms. Allocated memory is still 60.8 MB. Free memory was 37.8 MB in the beginning and 35.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 787.51 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 35.7 MB in the beginning and 41.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10010.49 ms. Allocated memory was 75.5 MB in the beginning and 96.5 MB in the end (delta: 21.0 MB). Free memory was 41.0 MB in the beginning and 60.7 MB in the end (delta: -19.7 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. * Witness Printer took 94.25 ms. Allocated memory is still 96.5 MB. Free memory was 60.7 MB in the beginning and 49.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 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: 545]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L550] int s ; [L554] s = 12292 [L13] int s__info_callback = __VERIFIER_nondet_int() ; [L14] int s__in_handshake = __VERIFIER_nondet_int() ; [L15] int s__state ; [L16] int s__new_session ; [L17] int s__server ; [L18] int s__version = __VERIFIER_nondet_int() ; [L19] int s__type ; [L20] int s__init_num ; [L21] int s__bbio = __VERIFIER_nondet_int() ; [L22] int s__wbio = __VERIFIER_nondet_int() ; [L23] int s__hit = __VERIFIER_nondet_int() ; [L24] int s__rwstate ; [L25] int s__init_buf___0 = 1; [L26] int s__debug = __VERIFIER_nondet_int() ; [L27] int s__shutdown ; [L28] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L29] int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_connect = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_hit = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_int() ; [L33] int s__s3__change_cipher_spec ; [L34] int s__s3__flags ; [L35] int s__s3__delay_buf_pop_ret ; [L36] int s__s3__tmp__cert_req = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_compression = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int() ; [L39] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L41] int s__s3__tmp__next_state___0 ; [L42] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int() ; [L43] int s__session__cipher ; [L44] int s__session__compress_meth ; [L45] int buf ; [L46] unsigned long tmp ; [L47] unsigned long l ; [L48] int num1 ; [L49] int cb ; [L50] int ret ; [L51] int new_state ; [L52] int state ; [L53] int skip ; [L54] int tmp___0 ; [L55] int tmp___1 = __VERIFIER_nondet_int() ; [L56] int tmp___2 = __VERIFIER_nondet_int() ; [L57] int tmp___3 = __VERIFIER_nondet_int() ; [L58] int tmp___4 = __VERIFIER_nondet_int() ; [L59] int tmp___5 = __VERIFIER_nondet_int() ; [L60] int tmp___6 = __VERIFIER_nondet_int() ; [L61] int tmp___7 = __VERIFIER_nondet_int() ; [L62] int tmp___8 = __VERIFIER_nondet_int() ; [L63] int tmp___9 = __VERIFIER_nondet_int() ; [L64] int blastFlag ; [L65] int __cil_tmp55 ; [L66] long __cil_tmp56 ; [L67] long __cil_tmp57 ; [L68] long __cil_tmp58 ; [L69] long __cil_tmp59 ; [L70] long __cil_tmp60 ; [L71] long __cil_tmp61 ; [L72] long __cil_tmp62 ; [L73] long __cil_tmp63 ; [L74] long __cil_tmp64 ; [L78] s__state = initial_state [L79] blastFlag = 0 [L80] tmp = __VERIFIER_nondet_int() [L81] cb = 0 [L82] ret = -1 [L83] skip = 0 [L84] tmp___0 = 0 [L85] COND TRUE s__info_callback != 0 [L86] cb = s__info_callback [L92] s__in_handshake ++ [L93] COND FALSE !(tmp___1 - 12288) [L99] COND TRUE 1 [L101] state = s__state [L102] COND TRUE s__state == 12292 [L204] s__new_session = 1 [L205] s__state = 4096 [L206] s__ctx__stats__sess_connect_renegotiate ++ [L211] s__server = 0 [L212] COND TRUE cb != 0 [L216] __cil_tmp55 = s__version - 65280 [L217] COND FALSE !(__cil_tmp55 != 768) [L222] s__type = 4096 [L223] COND FALSE !(s__init_buf___0 == 0) [L235] COND FALSE !(! tmp___4) [L239] COND FALSE !(! tmp___5) [L243] s__state = 4368 [L244] s__ctx__stats__sess_connect ++ [L245] s__init_num = 0 [L517] COND FALSE !(! s__s3__tmp__reuse_message) [L534] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 4096) [L111] COND FALSE !(s__state == 20480) [L114] COND FALSE !(s__state == 4099) [L117] COND TRUE s__state == 4368 [L249] s__shutdown = 0 [L250] ret = __VERIFIER_nondet_int() [L251] COND TRUE blastFlag == 0 [L252] blastFlag = 1 [L254] COND FALSE !(ret <= 0) [L257] s__state = 4384 [L258] s__init_num = 0 [L259] COND TRUE s__bbio != s__wbio [L517] COND FALSE !(! s__s3__tmp__reuse_message) [L534] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 4096) [L111] COND FALSE !(s__state == 20480) [L114] COND FALSE !(s__state == 4099) [L117] COND FALSE !(s__state == 4368) [L120] COND FALSE !(s__state == 4369) [L123] COND TRUE s__state == 4384 [L265] ret = __VERIFIER_nondet_int() [L266] COND TRUE blastFlag == 1 [L267] blastFlag = 2 [L269] COND FALSE !(ret <= 0) [L272] COND FALSE !(\read(s__hit)) [L275] s__state = 4400 [L277] s__init_num = 0 [L517] COND FALSE !(! s__s3__tmp__reuse_message) [L534] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 4096) [L111] COND FALSE !(s__state == 20480) [L114] COND FALSE !(s__state == 4099) [L117] COND FALSE !(s__state == 4368) [L120] COND FALSE !(s__state == 4369) [L123] COND FALSE !(s__state == 4384) [L126] COND FALSE !(s__state == 4385) [L129] COND TRUE s__state == 4400 [L281] COND FALSE !(s__s3__tmp__new_cipher__algorithms - 256) [L284] ret = __VERIFIER_nondet_int() [L285] COND TRUE blastFlag == 2 [L286] blastFlag = 3 [L288] COND FALSE !(ret <= 0) [L292] s__state = 4416 [L293] s__init_num = 0 [L517] COND FALSE !(! s__s3__tmp__reuse_message) [L534] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 4096) [L111] COND FALSE !(s__state == 20480) [L114] COND FALSE !(s__state == 4099) [L117] COND FALSE !(s__state == 4368) [L120] COND FALSE !(s__state == 4369) [L123] COND FALSE !(s__state == 4384) [L126] COND FALSE !(s__state == 4385) [L129] COND FALSE !(s__state == 4400) [L132] COND FALSE !(s__state == 4401) [L135] COND TRUE s__state == 4416 [L297] ret = __VERIFIER_nondet_int() [L298] COND TRUE blastFlag == 3 [L299] blastFlag = 4 [L301] COND FALSE !(ret <= 0) [L304] s__state = 4432 [L305] s__init_num = 0 [L306] COND FALSE !(! tmp___6) [L517] COND FALSE !(! s__s3__tmp__reuse_message) [L534] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 4096) [L111] COND FALSE !(s__state == 20480) [L114] COND FALSE !(s__state == 4099) [L117] COND FALSE !(s__state == 4368) [L120] COND FALSE !(s__state == 4369) [L123] COND FALSE !(s__state == 4384) [L126] COND FALSE !(s__state == 4385) [L129] COND FALSE !(s__state == 4400) [L132] COND FALSE !(s__state == 4401) [L135] COND FALSE !(s__state == 4416) [L138] COND FALSE !(s__state == 4417) [L141] COND TRUE s__state == 4432 [L313] ret = __VERIFIER_nondet_int() [L314] COND TRUE blastFlag == 4 [L545] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 127 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9809.7ms, OverallIterations: 10, TraceHistogramMax: 6, EmptinessCheckTime: 66.3ms, AutomataDifference: 1290.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1570 SDtfs, 509 SDslu, 1020 SDs, 0 SdLazy, 709 SolverSat, 118 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 715.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1274 GetRequests, 1263 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=558occurred in iteration=9, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 202.5ms AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 149.5ms SsaConstructionTime, 327.2ms SatisfiabilityAnalysisTime, 3709.9ms InterpolantComputationTime, 752 NumberOfCodeBlocks, 752 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1274 ConstructedInterpolants, 0 QuantifiedInterpolants, 1962 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1016 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 1172/1172 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 06:44:41,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f980071-c597-4427-be19-6f1de69c1884/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...