./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs --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 af6435cd57a20eac54acaf59c651a26bc7b64982 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs --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 af6435cd57a20eac54acaf59c651a26bc7b64982 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:13:24,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:13:24,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:13:24,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:13:24,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:13:24,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:13:24,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:13:24,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:13:24,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:13:24,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:13:24,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:13:24,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:13:24,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:13:24,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:13:24,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:13:24,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:13:24,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:13:24,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:13:24,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:13:24,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:13:24,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:13:24,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:13:24,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:13:24,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:13:24,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:13:24,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:13:24,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:13:24,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:13:24,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:13:24,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:13:24,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:13:24,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:13:24,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:13:24,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:13:24,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:13:24,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:13:24,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:13:24,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:13:24,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:13:24,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:13:24,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:13:24,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:13:24,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:13:24,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:13:24,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:13:24,705 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:13:24,706 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:13:24,706 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:13:24,706 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:13:24,706 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:13:24,712 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:13:24,713 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:13:24,714 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:13:24,714 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:13:24,714 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:13:24,714 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:13:24,715 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:13:24,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:13:24,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:13:24,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:13:24,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:13:24,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:13:24,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:13:24,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:13:24,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:13:24,717 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:13:24,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:13:24,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:13:24,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:13:24,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:13:24,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:13:24,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:13:24,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:13:24,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:13:24,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:13:24,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:13:24,721 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:13:24,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:13:24,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:13:24,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:13:24,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:13:24,721 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_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af6435cd57a20eac54acaf59c651a26bc7b64982 [2021-10-16 03:13:25,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:13:25,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:13:25,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:13:25,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:13:25,038 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:13:25,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-10-16 03:13:25,128 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data/14a247cf0/9f0d0272a51841ae82075d1263d3a2e7/FLAGf0227b45c [2021-10-16 03:13:25,583 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:13:25,584 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-10-16 03:13:25,591 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data/14a247cf0/9f0d0272a51841ae82075d1263d3a2e7/FLAGf0227b45c [2021-10-16 03:13:25,941 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data/14a247cf0/9f0d0272a51841ae82075d1263d3a2e7 [2021-10-16 03:13:25,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:13:25,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:13:25,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:13:25,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:13:25,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:13:25,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:13:25" (1/1) ... [2021-10-16 03:13:25,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685a2136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:25, skipping insertion in model container [2021-10-16 03:13:25,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:13:25" (1/1) ... [2021-10-16 03:13:25,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:13:25,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:13:26,164 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_629f3c79-b74c-4740-b853-5f399eddb244/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-10-16 03:13:26,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:13:26,184 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:13:26,196 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_629f3c79-b74c-4740-b853-5f399eddb244/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-10-16 03:13:26,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:13:26,215 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:13:26,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26 WrapperNode [2021-10-16 03:13:26,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:13:26,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:13:26,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:13:26,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:13:26,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:13:26,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:13:26,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:13:26,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:13:26,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:13:26,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:13:26,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:13:26,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:13:26,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (1/1) ... [2021-10-16 03:13:26,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:13:26,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:13:26,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:13:26,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:13:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:13:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:13:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:13:26,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:13:28,876 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:13:28,876 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 03:13:28,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:13:28 BoogieIcfgContainer [2021-10-16 03:13:28,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:13:28,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:13:28,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:13:28,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:13:28,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:13:25" (1/3) ... [2021-10-16 03:13:28,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7138d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:13:28, skipping insertion in model container [2021-10-16 03:13:28,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:26" (2/3) ... [2021-10-16 03:13:28,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7138d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:13:28, skipping insertion in model container [2021-10-16 03:13:28,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:13:28" (3/3) ... [2021-10-16 03:13:28,888 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound2.i [2021-10-16 03:13:28,901 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:13:28,901 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 03:13:28,948 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:13:28,961 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 [2021-10-16 03:13:28,962 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 03:13:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 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) [2021-10-16 03:13:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:13:28,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:28,990 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:13:28,991 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:28,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1384273294, now seen corresponding path program 1 times [2021-10-16 03:13:29,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:29,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362905712] [2021-10-16 03:13:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:29,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:29,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:29,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362905712] [2021-10-16 03:13:29,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362905712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:29,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:29,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:13:29,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797635383] [2021-10-16 03:13:29,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:13:29,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:13:29,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:13:29,179 INFO L87 Difference]: Start difference. First operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-16 03:13:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:29,193 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-10-16 03:13:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:13:29,195 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-10-16 03:13:29,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:29,202 INFO L225 Difference]: With dead ends: 28 [2021-10-16 03:13:29,202 INFO L226 Difference]: Without dead ends: 14 [2021-10-16 03:13:29,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:13:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-16 03:13:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-16 03:13:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-10-16 03:13:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-16 03:13:29,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2021-10-16 03:13:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:29,238 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-16 03:13:29,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-16 03:13:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-16 03:13:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:13:29,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:29,240 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:13:29,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:13:29,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash -346058289, now seen corresponding path program 1 times [2021-10-16 03:13:29,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:29,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849252307] [2021-10-16 03:13:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:29,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:29,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:29,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849252307] [2021-10-16 03:13:29,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849252307] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:29,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:29,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 03:13:29,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967955158] [2021-10-16 03:13:29,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:13:29,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:29,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:13:29,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:13:29,323 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-10-16 03:13:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:29,351 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-10-16 03:13:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:13:29,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2021-10-16 03:13:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:29,353 INFO L225 Difference]: With dead ends: 26 [2021-10-16 03:13:29,353 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 03:13:29,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:13:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 03:13:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 03:13:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-16 03:13:29,359 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2021-10-16 03:13:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:29,359 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-16 03:13:29,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-10-16 03:13:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-10-16 03:13:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:13:29,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:29,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:13:29,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:13:29,362 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2089077620, now seen corresponding path program 1 times [2021-10-16 03:13:29,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:29,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844149118] [2021-10-16 03:13:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:29,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:29,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 03:13:29,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003685815] [2021-10-16 03:13:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:29,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:13:29,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:13:29,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:13:29,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:13:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 03:13:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:29,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:30,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:30,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844149118] [2021-10-16 03:13:30,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 03:13:30,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003685815] [2021-10-16 03:13:30,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003685815] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:30,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:30,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 03:13:30,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735722120] [2021-10-16 03:13:30,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:13:30,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:13:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:13:30,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:13:30,096 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-16 03:13:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:36,358 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-10-16 03:13:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 03:13:36,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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 8 [2021-10-16 03:13:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:36,362 INFO L225 Difference]: With dead ends: 52 [2021-10-16 03:13:36,362 INFO L226 Difference]: Without dead ends: 42 [2021-10-16 03:13:36,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:13:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-16 03:13:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2021-10-16 03:13:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 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) [2021-10-16 03:13:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-16 03:13:36,370 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 8 [2021-10-16 03:13:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:36,370 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-16 03:13:36,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-16 03:13:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-10-16 03:13:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 03:13:36,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:36,372 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:13:36,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-16 03:13:36,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-16 03:13:36,589 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:36,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1026504725, now seen corresponding path program 1 times [2021-10-16 03:13:36,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:13:36,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350793659] [2021-10-16 03:13:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:36,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:13:36,608 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 03:13:36,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351948356] [2021-10-16 03:13:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:36,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:13:36,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:13:36,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:13:36,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 03:13:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:36,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 03:13:36,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:36,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:36,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:13:36,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350793659] [2021-10-16 03:13:36,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 03:13:36,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351948356] [2021-10-16 03:13:36,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351948356] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:13:36,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413881248] [2021-10-16 03:13:36,878 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-16 03:13:36,878 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:13:36,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:13:36,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:13:36,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:13:36,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:36,930 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:13:36,931 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:36,932 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 03:13:36,936 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:13:36,937 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:36,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 03:13:36,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-10-16 03:13:36,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:13:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:13:37,024 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 03:13:37,025 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 [2021-10-16 03:13:37,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:37,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:13:37,030 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:37,031 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:13:37,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:13:37,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:13:37,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:37,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:37,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-10-16 03:13:37,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:13:37,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:89 [2021-10-16 03:13:37,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-16 03:13:37,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:13:37,293 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) [2021-10-16 03:13:37,297 INFO L168 Benchmark]: Toolchain (without parser) took 11351.42 ms. Allocated memory is still 121.6 MB. Free memory was 86.0 MB in the beginning and 69.3 MB in the end (delta: 16.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:37,298 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 121.6 MB. Free memory was 92.6 MB in the beginning and 92.6 MB in the end (delta: 31.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:13:37,299 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.32 ms. Allocated memory is still 121.6 MB. Free memory was 85.8 MB in the beginning and 96.7 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:37,300 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.23 ms. Allocated memory is still 121.6 MB. Free memory was 96.7 MB in the beginning and 95.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:37,300 INFO L168 Benchmark]: Boogie Preprocessor took 30.70 ms. Allocated memory is still 121.6 MB. Free memory was 95.2 MB in the beginning and 93.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:37,301 INFO L168 Benchmark]: RCFGBuilder took 2568.39 ms. Allocated memory is still 121.6 MB. Free memory was 93.7 MB in the beginning and 82.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:37,302 INFO L168 Benchmark]: TraceAbstraction took 8416.17 ms. Allocated memory is still 121.6 MB. Free memory was 81.8 MB in the beginning and 69.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:37,305 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 121.6 MB. Free memory was 92.6 MB in the beginning and 92.6 MB in the end (delta: 31.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.32 ms. Allocated memory is still 121.6 MB. Free memory was 85.8 MB in the beginning and 96.7 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.23 ms. Allocated memory is still 121.6 MB. Free memory was 96.7 MB in the beginning and 95.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.70 ms. Allocated memory is still 121.6 MB. Free memory was 95.2 MB in the beginning and 93.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2568.39 ms. Allocated memory is still 121.6 MB. Free memory was 93.7 MB in the beginning and 82.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8416.17 ms. Allocated memory is still 121.6 MB. Free memory was 81.8 MB in the beginning and 69.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#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. [2021-10-16 03:13:37,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:13:40,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:13:40,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:13:40,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:13:40,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:13:40,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:13:40,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:13:40,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:13:40,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:13:40,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:13:40,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:13:40,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:13:40,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:13:40,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:13:40,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:13:40,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:13:40,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:13:40,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:13:40,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:13:40,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:13:40,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:13:40,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:13:40,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:13:40,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:13:40,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:13:40,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:13:40,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:13:40,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:13:40,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:13:40,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:13:40,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:13:40,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:13:40,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:13:40,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:13:40,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:13:40,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:13:40,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:13:40,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:13:40,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:13:40,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:13:40,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:13:40,291 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 03:13:40,347 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:13:40,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:13:40,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:13:40,349 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:13:40,350 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:13:40,350 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:13:40,350 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:13:40,350 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:13:40,351 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:13:40,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:13:40,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:13:40,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:13:40,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:13:40,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:13:40,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:13:40,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:13:40,355 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:13:40,355 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:13:40,356 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:13:40,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:13:40,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:13:40,356 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:13:40,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:13:40,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:13:40,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:13:40,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:13:40,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:13:40,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:13:40,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:13:40,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:13:40,359 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:13:40,359 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:13:40,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:13:40,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:13:40,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:13:40,360 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_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af6435cd57a20eac54acaf59c651a26bc7b64982 [2021-10-16 03:13:40,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:13:40,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:13:40,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:13:40,810 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:13:40,811 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:13:40,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-10-16 03:13:40,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data/fdcfeb6ee/dae0e052d0304c679f20791be181f397/FLAG5aa547acb [2021-10-16 03:13:41,553 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:13:41,554 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-10-16 03:13:41,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data/fdcfeb6ee/dae0e052d0304c679f20791be181f397/FLAG5aa547acb [2021-10-16 03:13:41,933 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/data/fdcfeb6ee/dae0e052d0304c679f20791be181f397 [2021-10-16 03:13:41,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:13:41,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:13:41,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:13:41,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:13:41,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:13:41,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:13:41" (1/1) ... [2021-10-16 03:13:41,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da3e342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:41, skipping insertion in model container [2021-10-16 03:13:41,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:13:41" (1/1) ... [2021-10-16 03:13:41,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:13:41,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:13:42,144 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_629f3c79-b74c-4740-b853-5f399eddb244/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-10-16 03:13:42,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:13:42,177 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:13:42,199 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_629f3c79-b74c-4740-b853-5f399eddb244/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-10-16 03:13:42,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:13:42,250 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:13:42,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42 WrapperNode [2021-10-16 03:13:42,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:13:42,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:13:42,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:13:42,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:13:42,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:13:42,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:13:42,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:13:42,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:13:42,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:13:42,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:13:42,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:13:42,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:13:42,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (1/1) ... [2021-10-16 03:13:42,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:13:42,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:13:42,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:13:42,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:13:42,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:13:42,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:13:42,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:13:42,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:13:42,776 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:13:42,777 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 03:13:42,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:13:42 BoogieIcfgContainer [2021-10-16 03:13:42,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:13:42,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:13:42,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:13:42,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:13:42,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:13:41" (1/3) ... [2021-10-16 03:13:42,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2735542c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:13:42, skipping insertion in model container [2021-10-16 03:13:42,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:13:42" (2/3) ... [2021-10-16 03:13:42,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2735542c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:13:42, skipping insertion in model container [2021-10-16 03:13:42,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:13:42" (3/3) ... [2021-10-16 03:13:42,801 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound2.i [2021-10-16 03:13:42,806 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:13:42,807 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 03:13:42,887 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:13:42,895 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 [2021-10-16 03:13:42,895 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 03:13:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:13:42,915 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:42,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:13:42,917 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1819218388, now seen corresponding path program 1 times [2021-10-16 03:13:42,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:13:42,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816737450] [2021-10-16 03:13:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:42,938 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:13:42,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:13:42,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:13:42,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:13:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 03:13:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:43,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:43,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:13:43,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816737450] [2021-10-16 03:13:43,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816737450] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:43,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:43,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:13:43,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85157165] [2021-10-16 03:13:43,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:13:43,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:13:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:13:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:13:43,175 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-16 03:13:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:43,192 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-10-16 03:13:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:13:43,193 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2021-10-16 03:13:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:43,203 INFO L225 Difference]: With dead ends: 35 [2021-10-16 03:13:43,204 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 03:13:43,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:13:43,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 03:13:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 03:13:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 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) [2021-10-16 03:13:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-10-16 03:13:43,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2021-10-16 03:13:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:43,247 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-10-16 03:13:43,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-16 03:13:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-10-16 03:13:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:13:43,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:43,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:13:43,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:13:43,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:13:43,461 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 177936045, now seen corresponding path program 1 times [2021-10-16 03:13:43,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:13:43,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289337602] [2021-10-16 03:13:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:43,465 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:13:43,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:13:43,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:13:43,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:13:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:43,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:13:43,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:43,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:43,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:13:43,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289337602] [2021-10-16 03:13:43,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289337602] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:43,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:43,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 03:13:43,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053255111] [2021-10-16 03:13:43,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:13:43,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:13:43,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:13:43,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:13:43,718 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-10-16 03:13:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:43,774 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2021-10-16 03:13:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:13:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 8 [2021-10-16 03:13:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:43,776 INFO L225 Difference]: With dead ends: 33 [2021-10-16 03:13:43,777 INFO L226 Difference]: Without dead ends: 22 [2021-10-16 03:13:43,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:13:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-16 03:13:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-16 03:13:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-10-16 03:13:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-10-16 03:13:43,789 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 8 [2021-10-16 03:13:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:43,792 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-10-16 03:13:43,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-10-16 03:13:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-10-16 03:13:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:13:43,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:43,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:13:43,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:13:44,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:13:44,009 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:44,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:44,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1269844846, now seen corresponding path program 1 times [2021-10-16 03:13:44,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:13:44,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269238942] [2021-10-16 03:13:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:44,012 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:13:44,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:13:44,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:13:44,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:13:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:44,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:13:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:44,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:45,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:13:45,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269238942] [2021-10-16 03:13:45,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269238942] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:45,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:45,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 03:13:45,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9963342] [2021-10-16 03:13:45,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:13:45,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:13:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:13:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:13:45,106 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-10-16 03:13:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:47,994 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-10-16 03:13:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 03:13:47,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) Word has length 9 [2021-10-16 03:13:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:47,998 INFO L225 Difference]: With dead ends: 50 [2021-10-16 03:13:47,998 INFO L226 Difference]: Without dead ends: 40 [2021-10-16 03:13:47,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:13:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-16 03:13:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-10-16 03:13:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-10-16 03:13:48,008 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 9 [2021-10-16 03:13:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:48,009 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-10-16 03:13:48,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-10-16 03:13:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-10-16 03:13:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 03:13:48,010 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:48,010 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:13:48,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-16 03:13:48,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:13:48,224 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 479667437, now seen corresponding path program 1 times [2021-10-16 03:13:48,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:13:48,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117835507] [2021-10-16 03:13:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:48,230 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:13:48,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:13:48,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:13:48,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 03:13:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 03:13:48,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:48,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:48,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:13:48,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117835507] [2021-10-16 03:13:48,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117835507] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:13:48,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [611138952] [2021-10-16 03:13:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:48,720 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:13:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:13:48,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:13:48,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-16 03:13:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:48,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 03:13:48,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:48,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:49,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [611138952] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:13:49,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627591339] [2021-10-16 03:13:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:49,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:13:49,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:13:49,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:13:49,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 03:13:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:13:49,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:49,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:49,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627591339] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:13:49,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:13:49,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 16 [2021-10-16 03:13:49,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462404491] [2021-10-16 03:13:49,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-16 03:13:49,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:13:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-16 03:13:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-16 03:13:49,658 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:49,979 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-10-16 03:13:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 03:13:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 03:13:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:49,981 INFO L225 Difference]: With dead ends: 45 [2021-10-16 03:13:49,981 INFO L226 Difference]: Without dead ends: 27 [2021-10-16 03:13:49,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 494.5ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-10-16 03:13:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-16 03:13:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-10-16 03:13:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 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) [2021-10-16 03:13:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-10-16 03:13:49,987 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2021-10-16 03:13:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:49,987 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-10-16 03:13:49,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:13:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-10-16 03:13:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 03:13:49,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:49,989 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:13:50,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:13:50,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-10-16 03:13:50,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:13:50,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:13:50,605 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:50,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1984750991, now seen corresponding path program 1 times [2021-10-16 03:13:50,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:13:50,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207733005] [2021-10-16 03:13:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:50,607 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:13:50,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:13:50,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:13:50,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 03:13:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:50,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:13:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 03:13:50,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 03:13:51,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:13:51,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207733005] [2021-10-16 03:13:51,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207733005] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:51,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:51,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-16 03:13:51,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508170672] [2021-10-16 03:13:51,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:13:51,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:13:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:13:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:13:51,240 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-16 03:13:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:51,368 INFO L93 Difference]: Finished difference Result 27 states and 26 transitions. [2021-10-16 03:13:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:13:51,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) Word has length 15 [2021-10-16 03:13:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:51,369 INFO L225 Difference]: With dead ends: 27 [2021-10-16 03:13:51,369 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 03:13:51,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:13:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 03:13:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 03:13:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0) internal successors, (15), 15 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) [2021-10-16 03:13:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2021-10-16 03:13:51,373 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 15 [2021-10-16 03:13:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:51,374 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2021-10-16 03:13:51,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-16 03:13:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2021-10-16 03:13:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 03:13:51,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:13:51,375 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:13:51,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 03:13:51,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:13:51,586 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:13:51,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:13:51,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1609614073, now seen corresponding path program 1 times [2021-10-16 03:13:51,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:13:51,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117527147] [2021-10-16 03:13:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:13:51,587 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:13:51,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:13:51,593 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:13:51,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 03:13:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:13:51,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 03:13:51,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:13:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:51,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:51,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:13:51,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117527147] [2021-10-16 03:13:51,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117527147] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:13:51,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:51,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 03:13:51,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509295788] [2021-10-16 03:13:51,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:13:51,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:13:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:13:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:13:51,850 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-10-16 03:13:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:13:51,863 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2021-10-16 03:13:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:13:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2021-10-16 03:13:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:13:51,866 INFO L225 Difference]: With dead ends: 16 [2021-10-16 03:13:51,866 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 03:13:51,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:13:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 03:13:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 03:13:51,867 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) [2021-10-16 03:13:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 03:13:51,867 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-10-16 03:13:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:13:51,867 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 03:13:51,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-10-16 03:13:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 03:13:51,868 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 03:13:51,870 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:13:51,871 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:13:51,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 03:13:52,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:13:52,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 03:13:52,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:13:52,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:13:52,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:13:52,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:13:52,467 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-10-16 03:13:52,467 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-10-16 03:13:52,468 INFO L853 garLoopResultBuilder]: At program point L19-2(line 40) the Hoare annotation is: (and (= (_ bv2 32) ~counter~0) (= ULTIMATE.start_main_~q~0 (_ bv0 32)) (= ULTIMATE.start_main_~b~0 (_ bv1 32)) (not (bvuge ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0)) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) [2021-10-16 03:13:52,468 INFO L857 garLoopResultBuilder]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2021-10-16 03:13:52,468 INFO L860 garLoopResultBuilder]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2021-10-16 03:13:52,468 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 03:13:52,468 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 03:13:52,468 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 03:13:52,469 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-10-16 03:13:52,469 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-10-16 03:13:52,469 INFO L857 garLoopResultBuilder]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2021-10-16 03:13:52,469 INFO L860 garLoopResultBuilder]: At program point L49(lines 26 50) the Hoare annotation is: true [2021-10-16 03:13:52,469 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 03:13:52,469 INFO L857 garLoopResultBuilder]: For program point L38(lines 38 47) no Hoare annotation was computed. [2021-10-16 03:13:52,469 INFO L857 garLoopResultBuilder]: For program point L38-2(lines 38 47) no Hoare annotation was computed. [2021-10-16 03:13:52,469 INFO L857 garLoopResultBuilder]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2021-10-16 03:13:52,470 INFO L853 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~q~0 (_ bv0 32))) (.cse1 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0))) (or (and (= ~counter~0 (_ bv1 32)) .cse0 (= (bvadd (bvmul ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~r~0) ULTIMATE.start_main_~A~0)) (and (= (_ bv2 32) ~counter~0) .cse0 .cse1) (and .cse0 (= ULTIMATE.start_main_~b~0 (_ bv1 32)) (= ~counter~0 (_ bv0 32)) .cse1 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0)))) [2021-10-16 03:13:52,470 INFO L857 garLoopResultBuilder]: For program point L43(lines 43 46) no Hoare annotation was computed. [2021-10-16 03:13:52,470 INFO L857 garLoopResultBuilder]: For program point L43-2(lines 26 50) no Hoare annotation was computed. [2021-10-16 03:13:52,470 INFO L857 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2021-10-16 03:13:52,474 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:13:52,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:13:52 BoogieIcfgContainer [2021-10-16 03:13:52,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:13:52,496 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:13:52,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:13:52,496 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:13:52,497 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:13:42" (3/4) ... [2021-10-16 03:13:52,500 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 03:13:52,516 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-16 03:13:52,517 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 03:13:52,517 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 03:13:52,517 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 03:13:52,582 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:13:52,582 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:13:52,585 INFO L168 Benchmark]: Toolchain (without parser) took 10644.38 ms. Allocated memory was 56.6 MB in the beginning and 79.7 MB in the end (delta: 23.1 MB). Free memory was 34.7 MB in the beginning and 40.8 MB in the end (delta: -6.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:52,585 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 56.6 MB. Free memory is still 36.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:13:52,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.81 ms. Allocated memory is still 56.6 MB. Free memory was 34.4 MB in the beginning and 39.5 MB in the end (delta: -5.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:52,586 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.53 ms. Allocated memory is still 56.6 MB. Free memory was 39.5 MB in the beginning and 38.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:52,587 INFO L168 Benchmark]: Boogie Preprocessor took 55.59 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 36.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:13:52,589 INFO L168 Benchmark]: RCFGBuilder took 438.37 ms. Allocated memory is still 56.6 MB. Free memory was 36.9 MB in the beginning and 27.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:52,590 INFO L168 Benchmark]: TraceAbstraction took 9701.49 ms. Allocated memory was 56.6 MB in the beginning and 79.7 MB in the end (delta: 23.1 MB). Free memory was 26.9 MB in the beginning and 43.6 MB in the end (delta: -16.6 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:52,590 INFO L168 Benchmark]: Witness Printer took 87.25 ms. Allocated memory is still 79.7 MB. Free memory was 43.6 MB in the beginning and 40.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:52,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 56.6 MB. Free memory is still 36.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 309.81 ms. Allocated memory is still 56.6 MB. Free memory was 34.4 MB in the beginning and 39.5 MB in the end (delta: -5.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.53 ms. Allocated memory is still 56.6 MB. Free memory was 39.5 MB in the beginning and 38.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.59 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 36.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 438.37 ms. Allocated memory is still 56.6 MB. Free memory was 36.9 MB in the beginning and 27.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9701.49 ms. Allocated memory was 56.6 MB in the beginning and 79.7 MB in the end (delta: 23.1 MB). Free memory was 26.9 MB in the beginning and 43.6 MB in the end (delta: -16.6 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Witness Printer took 87.25 ms. Allocated memory is still 79.7 MB. Free memory was 43.6 MB in the beginning and 40.8 MB in the end (delta: 2.7 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: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: 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, 20 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 9588.9ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 14.4ms, AutomataDifference: 3487.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 385.4ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 90 SDtfs, 133 SDslu, 173 SDs, 0 SdLazy, 142 SolverSat, 63 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2864.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1185.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=3, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.7ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 10 NumberOfFragments, 66 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 57.1ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 322.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 85.4ms SsaConstructionTime, 335.5ms SatisfiabilityAnalysisTime, 2847.7ms InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 176 ConstructedInterpolants, 0 QuantifiedInterpolants, 718 SizeOfPredicates, 20 NumberOfNonLiveVariables, 314 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 16 InterpolantComputations, 10 PerfectInterpolantSequences, 18/60 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: 40]: Loop Invariant Derived loop invariant: (((((2bv32 == counter && q == 0bv32) && b == 1bv32) && !~bvuge32(r, b)) && r == A) && b == B) && cond == 1bv32 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((counter == 1bv32 && q == 0bv32) && ~bvadd64(~bvmul32(q, b), r) == A) || ((2bv32 == counter && q == 0bv32) && r == A)) || ((((q == 0bv32 && b == 1bv32) && counter == 0bv32) && r == A) && b == B) RESULT: Ultimate proved your program to be correct! [2021-10-16 03:13:52,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_629f3c79-b74c-4740-b853-5f399eddb244/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...