./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i --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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/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 ff8bf597c44bf4fad2da445c30313c8319221d6a ................................................................................................................................................................................................................................................................................................................................................................................................. 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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/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 ff8bf597c44bf4fad2da445c30313c8319221d6a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:43:20,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:43:20,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:43:20,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:43:20,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:43:20,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:43:20,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:43:20,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:43:20,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:43:20,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:43:20,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:43:20,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:43:20,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:43:20,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:43:20,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:43:20,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:43:20,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:43:20,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:43:20,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:43:20,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:43:20,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:43:20,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:43:20,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:43:20,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:43:20,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:43:20,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:43:20,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:43:20,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:43:20,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:43:20,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:43:20,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:43:20,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:43:20,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:43:20,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:43:20,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:43:20,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:43:21,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:43:21,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:43:21,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:43:21,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:43:21,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:43:21,004 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:43:21,050 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:43:21,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:43:21,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:43:21,052 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:43:21,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:43:21,052 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:43:21,052 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:43:21,052 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:43:21,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:43:21,053 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:43:21,054 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:43:21,054 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:43:21,055 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:43:21,055 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:43:21,055 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:43:21,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:43:21,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:43:21,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:43:21,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:43:21,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:43:21,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:43:21,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:43:21,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:43:21,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:43:21,057 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:43:21,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:43:21,058 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:43:21,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:43:21,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:43:21,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:43:21,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:43:21,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:43:21,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:43:21,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:43:21,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:43:21,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:43:21,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:43:21,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:43:21,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:43:21,062 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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff8bf597c44bf4fad2da445c30313c8319221d6a [2021-10-13 07:43:21,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:43:21,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:43:21,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:43:21,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:43:21,440 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:43:21,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2021-10-13 07:43:21,517 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data/5bb48d34d/2008d6b1a30e43c98c2d613488cd6141/FLAG5fc3e4578 [2021-10-13 07:43:22,082 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:43:22,082 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2021-10-13 07:43:22,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data/5bb48d34d/2008d6b1a30e43c98c2d613488cd6141/FLAG5fc3e4578 [2021-10-13 07:43:22,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data/5bb48d34d/2008d6b1a30e43c98c2d613488cd6141 [2021-10-13 07:43:22,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:43:22,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:43:22,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:43:22,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:43:22,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:43:22,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2796f0f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22, skipping insertion in model container [2021-10-13 07:43:22,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:43:22,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:43:22,618 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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2021-10-13 07:43:22,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:43:22,660 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:43:22,671 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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2021-10-13 07:43:22,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:43:22,688 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:43:22,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22 WrapperNode [2021-10-13 07:43:22,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:43:22,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:43:22,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:43:22,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:43:22,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:43:22,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:43:22,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:43:22,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:43:22,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:43:22,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:43:22,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:43:22,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:43:22,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (1/1) ... [2021-10-13 07:43:22,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:43:22,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:22,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:43:22,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:43:22,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:43:22,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:43:22,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:43:22,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:43:23,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:43:23,167 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-13 07:43:23,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:23 BoogieIcfgContainer [2021-10-13 07:43:23,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:43:23,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:43:23,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:43:23,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:43:23,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:43:22" (1/3) ... [2021-10-13 07:43:23,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfeac8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:23, skipping insertion in model container [2021-10-13 07:43:23,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:22" (2/3) ... [2021-10-13 07:43:23,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfeac8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:23, skipping insertion in model container [2021-10-13 07:43:23,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:23" (3/3) ... [2021-10-13 07:43:23,192 INFO L111 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2021-10-13 07:43:23,198 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:43:23,213 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-13 07:43:23,278 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:43:23,285 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:43:23,285 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-13 07:43:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.6) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:43:23,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:23,304 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:43:23,305 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:23,311 INFO L82 PathProgramCache]: Analyzing trace with hash 75328627, now seen corresponding path program 1 times [2021-10-13 07:43:23,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:43:23,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703820564] [2021-10-13 07:43:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:23,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:43:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:23,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:43:23,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703820564] [2021-10-13 07:43:23,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703820564] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:43:23,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:43:23,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:43:23,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063453383] [2021-10-13 07:43:23,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:43:23,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:43:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:43:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:43:23,570 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.6) internal successors, (16), 12 states have internal predecessors, (16), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:23,614 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-10-13 07:43:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:43:23,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2021-10-13 07:43:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:23,624 INFO L225 Difference]: With dead ends: 27 [2021-10-13 07:43:23,624 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 07:43:23,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:43:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 07:43:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-10-13 07:43:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-13 07:43:23,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-10-13 07:43:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:23,657 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-13 07:43:23,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-13 07:43:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:43:23,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:23,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:23,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:43:23,659 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash -623477770, now seen corresponding path program 1 times [2021-10-13 07:43:23,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:43:23,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185828897] [2021-10-13 07:43:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:23,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:43:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:23,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:43:23,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185828897] [2021-10-13 07:43:23,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185828897] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:43:23,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:43:23,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:43:23,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439302377] [2021-10-13 07:43:23,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:43:23,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:43:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:43:23,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:43:23,716 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:23,747 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-13 07:43:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:43:23,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-10-13 07:43:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:23,748 INFO L225 Difference]: With dead ends: 16 [2021-10-13 07:43:23,749 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 07:43:23,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:43:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 07:43:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-10-13 07:43:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-13 07:43:23,754 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2021-10-13 07:43:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:23,755 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-13 07:43:23,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-13 07:43:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:43:23,756 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:23,756 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:23,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:43:23,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:23,757 INFO L82 PathProgramCache]: Analyzing trace with hash 405994558, now seen corresponding path program 1 times [2021-10-13 07:43:23,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:43:23,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095340929] [2021-10-13 07:43:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:23,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:43:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:23,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:43:23,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095340929] [2021-10-13 07:43:23,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095340929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:43:23,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90296201] [2021-10-13 07:43:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:23,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:23,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:43:23,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:43:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:43:23,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:24,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:24,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90296201] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:24,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590961726] [2021-10-13 07:43:24,327 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-13 07:43:24,328 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:43:24,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:43:24,339 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:43:24,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:43:24,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:24,376 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:43:24,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:24,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:43:24,379 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:43:24,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:24,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:43:24,384 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-13 07:43:24,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:43:24,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:43:24,449 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:43:24,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:43:24,451 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:24,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:43:24,455 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:24,455 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:43:24,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:43:24,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:43:24,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:24,475 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:43:24,477 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-13 07:43:24,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:43:24,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:82 [2021-10-13 07:43:24,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:24,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:24,695 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_8| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:43:24,699 INFO L168 Benchmark]: Toolchain (without parser) took 2268.49 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 54.1 MB in the beginning and 63.1 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:24,700 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 92.3 MB. Free memory is still 70.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:43:24,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.95 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 53.9 MB in the beginning and 89.3 MB in the end (delta: -35.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:24,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.41 ms. Allocated memory is still 113.2 MB. Free memory was 89.3 MB in the beginning and 87.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:24,702 INFO L168 Benchmark]: Boogie Preprocessor took 37.22 ms. Allocated memory is still 113.2 MB. Free memory was 87.7 MB in the beginning and 86.8 MB in the end (delta: 819.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:43:24,703 INFO L168 Benchmark]: RCFGBuilder took 407.83 ms. Allocated memory is still 113.2 MB. Free memory was 86.8 MB in the beginning and 76.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:24,703 INFO L168 Benchmark]: TraceAbstraction took 1526.31 ms. Allocated memory is still 113.2 MB. Free memory was 75.5 MB in the beginning and 63.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:24,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 92.3 MB. Free memory is still 70.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.95 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 53.9 MB in the beginning and 89.3 MB in the end (delta: -35.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.41 ms. Allocated memory is still 113.2 MB. Free memory was 89.3 MB in the beginning and 87.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.22 ms. Allocated memory is still 113.2 MB. Free memory was 87.7 MB in the beginning and 86.8 MB in the end (delta: 819.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 407.83 ms. Allocated memory is still 113.2 MB. Free memory was 86.8 MB in the beginning and 76.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1526.31 ms. Allocated memory is still 113.2 MB. Free memory was 75.5 MB in the beginning and 63.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_8| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_8|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:43:24,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:43:27,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:43:27,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:43:27,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:43:27,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:43:27,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:43:27,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:43:27,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:43:27,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:43:27,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:43:27,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:43:27,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:43:27,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:43:27,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:43:27,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:43:27,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:43:27,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:43:27,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:43:27,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:43:27,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:43:27,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:43:27,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:43:27,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:43:27,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:43:27,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:43:27,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:43:27,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:43:27,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:43:27,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:43:27,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:43:27,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:43:27,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:43:27,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:43:27,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:43:27,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:43:27,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:43:27,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:43:27,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:43:27,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:43:27,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:43:27,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:43:27,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:43:27,617 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:43:27,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:43:27,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:43:27,620 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:43:27,620 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:43:27,621 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:43:27,621 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:43:27,621 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:43:27,621 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:43:27,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:43:27,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:43:27,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:43:27,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:43:27,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:43:27,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:43:27,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:43:27,626 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:43:27,626 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:43:27,627 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:43:27,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:43:27,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:43:27,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:43:27,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:43:27,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:43:27,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:43:27,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:43:27,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:43:27,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:43:27,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:43:27,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:43:27,630 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:43:27,631 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:27,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:43:27,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:43:27,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:43:27,632 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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff8bf597c44bf4fad2da445c30313c8319221d6a [2021-10-13 07:43:27,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:43:28,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:43:28,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:43:28,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:43:28,034 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:43:28,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2021-10-13 07:43:28,114 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data/94bb187be/a66fc1b4d74a427ca89b6cbe588efd41/FLAG5db48b324 [2021-10-13 07:43:28,749 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:43:28,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2021-10-13 07:43:28,757 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data/94bb187be/a66fc1b4d74a427ca89b6cbe588efd41/FLAG5db48b324 [2021-10-13 07:43:29,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/data/94bb187be/a66fc1b4d74a427ca89b6cbe588efd41 [2021-10-13 07:43:29,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:43:29,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:43:29,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:43:29,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:43:29,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:43:29,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691f7b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29, skipping insertion in model container [2021-10-13 07:43:29,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:43:29,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:43:29,310 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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2021-10-13 07:43:29,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:43:29,356 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:43:29,376 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_49b71de5-8a16-4e89-a78a-33ad2e2a8309/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2021-10-13 07:43:29,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:43:29,425 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:43:29,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29 WrapperNode [2021-10-13 07:43:29,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:43:29,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:43:29,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:43:29,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:43:29,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:43:29,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:43:29,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:43:29,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:43:29,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:43:29,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:43:29,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:43:29,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:43:29,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (1/1) ... [2021-10-13 07:43:29,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:43:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:29,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:43:29,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:43:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:43:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:43:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:43:29,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:43:29,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:43:29,818 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-13 07:43:29,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:29 BoogieIcfgContainer [2021-10-13 07:43:29,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:43:29,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:43:29,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:43:29,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:43:29,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:43:29" (1/3) ... [2021-10-13 07:43:29,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8705f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:29, skipping insertion in model container [2021-10-13 07:43:29,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:29" (2/3) ... [2021-10-13 07:43:29,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8705f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:29, skipping insertion in model container [2021-10-13 07:43:29,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:29" (3/3) ... [2021-10-13 07:43:29,828 INFO L111 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2021-10-13 07:43:29,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:43:29,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-13 07:43:29,899 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:43:29,906 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:43:29,906 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-13 07:43:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:43:29,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:29,926 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:29,926 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:29,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1804971340, now seen corresponding path program 1 times [2021-10-13 07:43:29,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:29,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106509515] [2021-10-13 07:43:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:29,945 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:29,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:29,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:29,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:43:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:30,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:43:30,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:30,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:30,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:30,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106509515] [2021-10-13 07:43:30,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106509515] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:43:30,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:43:30,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:43:30,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902315684] [2021-10-13 07:43:30,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:43:30,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:43:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:43:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:43:30,243 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:30,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:30,411 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-10-13 07:43:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:43:30,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 7 [2021-10-13 07:43:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:30,422 INFO L225 Difference]: With dead ends: 56 [2021-10-13 07:43:30,422 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 07:43:30,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:43:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 07:43:30,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-10-13 07:43:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-13 07:43:30,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 7 [2021-10-13 07:43:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:30,459 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-13 07:43:30,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-13 07:43:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:43:30,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:30,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:30,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:30,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:43:30,676 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:30,680 INFO L82 PathProgramCache]: Analyzing trace with hash -589174129, now seen corresponding path program 1 times [2021-10-13 07:43:30,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:30,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935594790] [2021-10-13 07:43:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:30,683 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:30,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:30,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:30,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:43:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:30,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:43:30,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:30,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:31,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:31,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935594790] [2021-10-13 07:43:31,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935594790] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:43:31,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:43:31,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:43:31,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109129621] [2021-10-13 07:43:31,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:43:31,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:43:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:43:31,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:43:31,089 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:31,328 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-10-13 07:43:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:43:31,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 9 [2021-10-13 07:43:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:31,331 INFO L225 Difference]: With dead ends: 26 [2021-10-13 07:43:31,331 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 07:43:31,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:43:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 07:43:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-10-13 07:43:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-10-13 07:43:31,342 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 9 [2021-10-13 07:43:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:31,345 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-10-13 07:43:31,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-10-13 07:43:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:43:31,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:31,347 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:31,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:31,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:43:31,548 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:31,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash -517644532, now seen corresponding path program 1 times [2021-10-13 07:43:31,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:31,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254623320] [2021-10-13 07:43:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:31,550 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:31,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:31,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:43:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:43:31,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:31,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:31,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:31,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254623320] [2021-10-13 07:43:31,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254623320] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:31,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1322864335] [2021-10-13 07:43:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:31,854 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:31,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:43:31,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:43:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:43:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:31,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:43:31,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:32,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:32,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1322864335] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:32,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092194111] [2021-10-13 07:43:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:32,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:32,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:43:32,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:43:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:43:32,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:32,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:32,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092194111] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:32,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:43:32,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 9] total 16 [2021-10-13 07:43:32,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560817213] [2021-10-13 07:43:32,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:43:32,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:43:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:43:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:43:32,771 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:33,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:33,353 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-10-13 07:43:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 07:43:33,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 17 [2021-10-13 07:43:33,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:33,355 INFO L225 Difference]: With dead ends: 43 [2021-10-13 07:43:33,355 INFO L226 Difference]: Without dead ends: 41 [2021-10-13 07:43:33,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 666.2ms TimeCoverageRelationStatistics Valid=308, Invalid=622, Unknown=0, NotChecked=0, Total=930 [2021-10-13 07:43:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-13 07:43:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 20. [2021-10-13 07:43:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 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 07:43:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-13 07:43:33,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2021-10-13 07:43:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:33,363 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-13 07:43:33,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-13 07:43:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:43:33,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:33,365 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:33,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-13 07:43:33,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:43:33,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:33,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:33,968 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:33,968 INFO L82 PathProgramCache]: Analyzing trace with hash 759966799, now seen corresponding path program 1 times [2021-10-13 07:43:33,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:33,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235866909] [2021-10-13 07:43:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:33,970 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:33,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:33,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:33,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:43:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:43:34,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:34,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:35,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:35,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235866909] [2021-10-13 07:43:35,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235866909] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:35,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599470796] [2021-10-13 07:43:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:35,518 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:35,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:43:35,520 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:43:35,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:43:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:35,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:43:35,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:36,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:37,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1599470796] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:37,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790848708] [2021-10-13 07:43:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:43:37,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:37,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:37,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:43:37,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:43:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:43:37,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 07:43:37,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:38,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:39,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790848708] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:39,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:43:39,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11, 11, 14, 14] total 41 [2021-10-13 07:43:39,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020648999] [2021-10-13 07:43:39,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-13 07:43:39,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:43:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-13 07:43:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 07:43:39,628 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:41,752 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-10-13 07:43:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 07:43:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 07:43:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:41,754 INFO L225 Difference]: With dead ends: 44 [2021-10-13 07:43:41,754 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 07:43:41,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 4003.3ms TimeCoverageRelationStatistics Valid=859, Invalid=2801, Unknown=0, NotChecked=0, Total=3660 [2021-10-13 07:43:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 07:43:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-10-13 07:43:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 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 07:43:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-10-13 07:43:41,766 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 19 [2021-10-13 07:43:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:41,767 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-10-13 07:43:41,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-10-13 07:43:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 07:43:41,768 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:41,769 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:41,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:41,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:42,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:42,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:42,386 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2123833295, now seen corresponding path program 2 times [2021-10-13 07:43:42,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:42,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308014799] [2021-10-13 07:43:42,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:43:42,387 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:42,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:42,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:42,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:43:42,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:43:42,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:42,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:43:42,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-13 07:43:43,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-13 07:43:43,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:43,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308014799] [2021-10-13 07:43:43,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308014799] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:43,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [198990752] [2021-10-13 07:43:43,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:43:43,687 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:43,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:43:43,688 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:43:43,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:43:44,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:43:44,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:44,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:43:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-13 07:43:44,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-13 07:43:44,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [198990752] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:44,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33766570] [2021-10-13 07:43:44,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:43:44,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:44,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:44,811 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:43:44,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:43:45,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 07:43:45,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:45,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:43:45,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-13 07:43:45,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-13 07:43:45,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33766570] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:45,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:43:45,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-13 07:43:45,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806813954] [2021-10-13 07:43:45,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:43:45,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:43:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:43:45,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:43:45,989 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:46,193 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-10-13 07:43:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:43:46,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-13 07:43:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:46,195 INFO L225 Difference]: With dead ends: 40 [2021-10-13 07:43:46,195 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:43:46,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:43:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:43:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:43:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:43:46,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2021-10-13 07:43:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:46,197 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:43:46,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:43:46,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:43:46,200 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:43:46,201 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:43:46,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:46,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:46,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:46,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:43:46,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:43:46,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:43:46,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:43:46,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:43:46,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:43:46,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:43:48,183 INFO L857 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2021-10-13 07:43:48,183 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:43:48,184 INFO L857 garLoopResultBuilder]: For program point L33-1(line 33) no Hoare annotation was computed. [2021-10-13 07:43:48,184 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-13 07:43:48,184 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-13 07:43:48,184 INFO L857 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-10-13 07:43:48,184 INFO L860 garLoopResultBuilder]: At program point L44(lines 25 45) the Hoare annotation is: true [2021-10-13 07:43:48,184 INFO L860 garLoopResultBuilder]: At program point L44-1(lines 24 45) the Hoare annotation is: true [2021-10-13 07:43:48,185 INFO L853 garLoopResultBuilder]: At program point L38-2(lines 38 43) the Hoare annotation is: (let ((.cse0 (bvslt ULTIMATE.start_main_~MAXPATHLEN~0 (_ bv2147483647 32))) (.cse1 (bvsgt ULTIMATE.start_main_~MAXPATHLEN~0 (_ bv0 32))) (.cse2 (= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0))) (or (and .cse0 (= ULTIMATE.start_main_~glob2_pathlim_off~0 (bvadd ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0)) .cse1 .cse2) (and .cse0 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvsle (_ bv0 32) ULTIMATE.start_main_~glob2_p_off~0) .cse1 .cse2))) [2021-10-13 07:43:48,185 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:43:48,185 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:43:48,185 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:43:48,185 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-13 07:43:48,185 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-13 07:43:48,185 INFO L853 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (and (bvslt ULTIMATE.start_main_~MAXPATHLEN~0 (_ bv2147483647 32)) (bvsle ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvsle (_ bv0 32) ULTIMATE.start_main_~glob2_p_off~0) (bvsgt ULTIMATE.start_main_~MAXPATHLEN~0 (_ bv0 32)) (= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0)) [2021-10-13 07:43:48,186 INFO L857 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-10-13 07:43:48,186 INFO L853 garLoopResultBuilder]: At program point L18-5(lines 1 45) the Hoare annotation is: (and (bvslt ULTIMATE.start_main_~glob2_p_off~0 (bvadd (_ bv1 32) ULTIMATE.start_main_~MAXPATHLEN~0)) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (bvsle (_ bv0 32) ULTIMATE.start_main_~glob2_p_off~0) (bvsgt ULTIMATE.start_main_~MAXPATHLEN~0 (_ bv0 32)) (= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0)) [2021-10-13 07:43:48,198 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:43:48,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:43:48 BoogieIcfgContainer [2021-10-13 07:43:48,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:43:48,228 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:43:48,228 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:43:48,228 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:43:48,229 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:29" (3/4) ... [2021-10-13 07:43:48,232 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:43:48,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-13 07:43:48,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:43:48,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:43:48,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:43:48,324 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:43:48,325 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:43:48,327 INFO L168 Benchmark]: Toolchain (without parser) took 19181.46 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 36.4 MB in the beginning and 38.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:48,327 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 58.7 MB. Free memory is still 38.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:43:48,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.17 ms. Allocated memory is still 58.7 MB. Free memory was 36.2 MB in the beginning and 41.0 MB in the end (delta: -4.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:48,328 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.92 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 39.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:43:48,329 INFO L168 Benchmark]: Boogie Preprocessor took 54.79 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 38.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:48,329 INFO L168 Benchmark]: RCFGBuilder took 294.60 ms. Allocated memory is still 58.7 MB. Free memory was 38.4 MB in the beginning and 29.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:48,330 INFO L168 Benchmark]: TraceAbstraction took 18405.85 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 28.6 MB in the beginning and 41.8 MB in the end (delta: -13.2 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:48,330 INFO L168 Benchmark]: Witness Printer took 96.97 ms. Allocated memory is still 88.1 MB. Free memory was 41.8 MB in the beginning and 38.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:48,332 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 58.7 MB. Free memory is still 38.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.17 ms. Allocated memory is still 58.7 MB. Free memory was 36.2 MB in the beginning and 41.0 MB in the end (delta: -4.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.92 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 39.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.79 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 38.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 294.60 ms. Allocated memory is still 58.7 MB. Free memory was 38.4 MB in the beginning and 29.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18405.85 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 28.6 MB in the beginning and 41.8 MB in the end (delta: -13.2 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. * Witness Printer took 96.97 ms. Allocated memory is still 88.1 MB. Free memory was 41.8 MB in the beginning and 38.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 18300.1ms, OverallIterations: 5, TraceHistogramMax: 7, EmptinessCheckTime: 12.5ms, AutomataDifference: 3372.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1379.3ms, InitialAbstractionConstructionTime: 9.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42 SDtfs, 287 SDslu, 142 SDs, 0 SdLazy, 321 SolverSat, 249 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 919.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 509 GetRequests, 385 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 5296.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=4, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.3ms AutomataMinimizationTime, 5 MinimizatonAttempts, 32 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 33 NumberOfFragments, 71 HoareAnnotationTreeSize, 5 FomulaSimplifications, 2727 FormulaSimplificationTreeSizeReduction, 182.3ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 924 FormulaSimplificationTreeSizeReductionInter, 1190.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 83.8ms SsaConstructionTime, 283.5ms SatisfiabilityAnalysisTime, 9311.7ms InterpolantComputationTime, 241 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 460 ConstructedInterpolants, 0 QuantifiedInterpolants, 3968 SizeOfPredicates, 96 NumberOfNonLiveVariables, 447 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 486/726 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((~bvslt32(MAXPATHLEN, 2147483647bv32) && ~bvsle32(glob2_p_off, MAXPATHLEN)) && cond == 1bv32) && ~bvsle32(0bv32, glob2_p_off)) && ~bvsgt32(MAXPATHLEN, 0bv32)) && glob2_pathlim_off == MAXPATHLEN - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: (((~bvslt32(glob2_p_off, ~bvadd64(1bv32, MAXPATHLEN)) && cond == 1bv32) && ~bvsle32(0bv32, glob2_p_off)) && ~bvsgt32(MAXPATHLEN, 0bv32)) && glob2_pathlim_off == MAXPATHLEN - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (((~bvslt32(MAXPATHLEN, 2147483647bv32) && glob2_pathlim_off == ~bvadd64(glob2_p_off, MAXPATHLEN)) && ~bvsgt32(MAXPATHLEN, 0bv32)) && glob2_pathlim_off == MAXPATHLEN) || ((((~bvslt32(MAXPATHLEN, 2147483647bv32) && cond == 1bv32) && ~bvsle32(0bv32, glob2_p_off)) && ~bvsgt32(MAXPATHLEN, 0bv32)) && glob2_pathlim_off == MAXPATHLEN) RESULT: Ultimate proved your program to be correct! [2021-10-13 07:43:48,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49b71de5-8a16-4e89-a78a-33ad2e2a8309/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...