./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b312eb4f8caa7cb61d3a06c0594e4f86d10948be ............................................................................................................................................................................................................................................................................................................................................................. 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_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b312eb4f8caa7cb61d3a06c0594e4f86d10948be ............................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:17:07,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:17:07,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:17:07,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:17:07,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:17:07,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:17:07,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:17:07,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:17:07,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:17:07,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:17:07,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:17:07,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:17:07,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:17:07,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:17:07,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:17:07,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:17:07,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:17:07,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:17:07,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:17:07,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:17:07,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:17:07,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:17:07,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:17:07,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:17:07,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:17:07,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:17:07,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:17:07,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:17:07,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:17:07,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:17:07,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:17:07,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:17:07,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:17:07,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:17:07,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:17:07,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:17:07,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:17:07,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:17:07,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:17:07,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:17:07,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:17:07,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:17:07,680 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:17:07,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:17:07,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:17:07,682 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:17:07,682 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:17:07,683 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:17:07,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:17:07,684 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:17:07,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:17:07,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:17:07,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:17:07,685 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:17:07,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:17:07,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:17:07,686 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:17:07,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:17:07,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:17:07,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:17:07,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:17:07,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:17:07,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:17:07,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:17:07,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:17:07,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:17:07,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:17:07,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:17:07,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:17:07,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:17:07,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:17:07,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:17:07,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:07,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:17:07,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:17:07,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:17:07,694 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:17:07,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:17:07,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:17:07,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:17:07,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:17:07,695 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_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b312eb4f8caa7cb61d3a06c0594e4f86d10948be [2021-10-13 07:17:07,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:17:08,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:17:08,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:17:08,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:17:08,046 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:17:08,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/string-1.i [2021-10-13 07:17:08,129 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data/4b74b7629/29bed0ae6f3b49bf81d28a4000abff7a/FLAGe1ba4153f [2021-10-13 07:17:08,671 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:17:08,674 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/sv-benchmarks/c/loops/string-1.i [2021-10-13 07:17:08,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data/4b74b7629/29bed0ae6f3b49bf81d28a4000abff7a/FLAGe1ba4153f [2021-10-13 07:17:09,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data/4b74b7629/29bed0ae6f3b49bf81d28a4000abff7a [2021-10-13 07:17:09,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:17:09,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:17:09,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:09,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:17:09,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:17:09,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0aee9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09, skipping insertion in model container [2021-10-13 07:17:09,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:17:09,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:17:09,250 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_df88a6fe-3b20-405a-af9d-0b1d3919be1c/sv-benchmarks/c/loops/string-1.i[896,909] [2021-10-13 07:17:09,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:09,280 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:17:09,296 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_df88a6fe-3b20-405a-af9d-0b1d3919be1c/sv-benchmarks/c/loops/string-1.i[896,909] [2021-10-13 07:17:09,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:09,318 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:17:09,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09 WrapperNode [2021-10-13 07:17:09,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:09,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:09,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:17:09,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:17:09,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:09,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:17:09,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:17:09,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:17:09,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:17:09,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:17:09,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:17:09,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:17:09,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (1/1) ... [2021-10-13 07:17:09,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:09,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:09,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:17:09,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:17:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:17:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:17:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:17:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:17:09,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:17:09,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:17:09,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:17:09,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:17:09,915 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:17:09,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:09 BoogieIcfgContainer [2021-10-13 07:17:09,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:17:09,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:17:09,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:17:09,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:17:09,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:09" (1/3) ... [2021-10-13 07:17:09,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a90267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:09, skipping insertion in model container [2021-10-13 07:17:09,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:09" (2/3) ... [2021-10-13 07:17:09,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a90267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:09, skipping insertion in model container [2021-10-13 07:17:09,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:09" (3/3) ... [2021-10-13 07:17:09,925 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2021-10-13 07:17:09,931 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:17:09,931 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:17:10,006 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:17:10,013 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:17:10,013 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:17:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:17:10,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:10,034 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:10,035 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash -431386043, now seen corresponding path program 1 times [2021-10-13 07:17:10,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:17:10,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478465554] [2021-10-13 07:17:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:10,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:17:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:10,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:17:10,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478465554] [2021-10-13 07:17:10,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478465554] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:10,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:10,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:17:10,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43911024] [2021-10-13 07:17:10,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:10,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:17:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:10,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:10,241 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 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 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2021-10-13 07:17:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:10,283 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2021-10-13 07:17:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:10,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 12 [2021-10-13 07:17:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:10,293 INFO L225 Difference]: With dead ends: 43 [2021-10-13 07:17:10,294 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 07:17:10,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 07:17:10,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-10-13 07:17:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-10-13 07:17:10,327 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2021-10-13 07:17:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:10,328 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-10-13 07:17:10,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2021-10-13 07:17:10,329 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-10-13 07:17:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:17:10,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:10,330 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:10,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:17:10,331 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:10,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:10,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1062173536, now seen corresponding path program 1 times [2021-10-13 07:17:10,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:17:10,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761856771] [2021-10-13 07:17:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:10,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:17:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:17:10,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:17:10,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761856771] [2021-10-13 07:17:10,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761856771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:17:10,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791535872] [2021-10-13 07:17:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:10,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:17:10,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:10,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:17:10,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:17:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:10,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:17:10,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:17:10,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:17:10,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791535872] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:10,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457512567] [2021-10-13 07:17:10,802 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-13 07:17:10,803 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:17:10,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:17:10,815 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:17:10,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:17:10,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:10,860 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:17:10,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:10,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-13 07:17:10,865 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:17:10,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:10,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-10-13 07:17:10,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 158 [2021-10-13 07:17:10,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:17:10,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:17:10,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:17:10,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:17:11,012 INFO L354 Elim1Store]: treesize reduction 141, result has 10.2 percent of original size [2021-10-13 07:17:11,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 63 treesize of output 62 [2021-10-13 07:17:11,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:11,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 07:17:11,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:11,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 07:17:11,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:17:11,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:17:11,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:11,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:11,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-13 07:17:11,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:17:11,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:155, output treesize:136 [2021-10-13 07:17:11,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:11,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:17:11,342 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_13| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:17:11,345 INFO L168 Benchmark]: Toolchain (without parser) took 2339.29 ms. Allocated memory is still 119.5 MB. Free memory was 82.2 MB in the beginning and 70.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:11,346 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 119.5 MB. Free memory is still 98.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:11,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.27 ms. Allocated memory is still 119.5 MB. Free memory was 82.0 MB in the beginning and 93.8 MB in the end (delta: -11.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:11,347 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.11 ms. Allocated memory is still 119.5 MB. Free memory was 93.8 MB in the beginning and 92.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:11,348 INFO L168 Benchmark]: Boogie Preprocessor took 27.17 ms. Allocated memory is still 119.5 MB. Free memory was 92.1 MB in the beginning and 91.2 MB in the end (delta: 961.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:11,348 INFO L168 Benchmark]: RCFGBuilder took 530.94 ms. Allocated memory is still 119.5 MB. Free memory was 90.7 MB in the beginning and 76.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:11,349 INFO L168 Benchmark]: TraceAbstraction took 1425.36 ms. Allocated memory is still 119.5 MB. Free memory was 75.9 MB in the beginning and 70.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:11,353 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 119.5 MB. Free memory is still 98.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.27 ms. Allocated memory is still 119.5 MB. Free memory was 82.0 MB in the beginning and 93.8 MB in the end (delta: -11.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.11 ms. Allocated memory is still 119.5 MB. Free memory was 93.8 MB in the beginning and 92.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.17 ms. Allocated memory is still 119.5 MB. Free memory was 92.1 MB in the beginning and 91.2 MB in the end (delta: 961.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 530.94 ms. Allocated memory is still 119.5 MB. Free memory was 90.7 MB in the beginning and 76.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1425.36 ms. Allocated memory is still 119.5 MB. Free memory was 75.9 MB in the beginning and 70.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 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_13| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_13|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:17:11,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:17:13,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:17:13,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:17:13,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:17:13,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:17:13,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:17:13,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:17:13,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:17:13,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:17:13,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:17:13,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:17:13,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:17:13,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:17:13,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:17:13,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:17:13,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:17:13,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:17:13,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:17:13,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:17:14,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:17:14,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:17:14,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:17:14,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:17:14,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:17:14,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:17:14,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:17:14,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:17:14,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:17:14,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:17:14,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:17:14,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:17:14,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:17:14,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:17:14,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:17:14,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:17:14,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:17:14,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:17:14,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:17:14,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:17:14,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:17:14,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:17:14,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:17:14,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:17:14,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:17:14,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:17:14,083 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:17:14,083 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:17:14,083 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:17:14,083 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:17:14,084 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:17:14,084 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:17:14,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:17:14,087 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:17:14,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:17:14,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:17:14,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:17:14,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:17:14,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:17:14,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:17:14,088 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:17:14,089 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:17:14,089 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:17:14,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:17:14,089 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:17:14,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:17:14,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:17:14,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:17:14,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:17:14,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:14,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:17:14,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:17:14,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:17:14,092 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:17:14,092 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:14,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:17:14,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:17:14,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:17:14,094 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_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b312eb4f8caa7cb61d3a06c0594e4f86d10948be [2021-10-13 07:17:14,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:17:14,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:17:14,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:17:14,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:17:14,585 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:17:14,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/string-1.i [2021-10-13 07:17:14,668 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data/9435011c9/72baea5c8f8b459e9e60c80852809f4d/FLAGb71895546 [2021-10-13 07:17:15,254 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:17:15,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/sv-benchmarks/c/loops/string-1.i [2021-10-13 07:17:15,266 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data/9435011c9/72baea5c8f8b459e9e60c80852809f4d/FLAGb71895546 [2021-10-13 07:17:15,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/data/9435011c9/72baea5c8f8b459e9e60c80852809f4d [2021-10-13 07:17:15,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:17:15,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:17:15,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:15,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:17:15,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:17:15,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3847754e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15, skipping insertion in model container [2021-10-13 07:17:15,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:17:15,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:17:15,789 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_df88a6fe-3b20-405a-af9d-0b1d3919be1c/sv-benchmarks/c/loops/string-1.i[896,909] [2021-10-13 07:17:15,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:15,820 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:17:15,831 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_df88a6fe-3b20-405a-af9d-0b1d3919be1c/sv-benchmarks/c/loops/string-1.i[896,909] [2021-10-13 07:17:15,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:15,860 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:17:15,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15 WrapperNode [2021-10-13 07:17:15,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:15,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:15,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:17:15,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:17:15,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:15,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:17:15,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:17:15,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:17:15,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:17:15,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:17:15,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:17:15,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:17:15,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (1/1) ... [2021-10-13 07:17:15,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:15,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:16,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:17:16,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:17:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-13 07:17:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:17:16,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:17:16,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:17:16,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:17:16,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-13 07:17:16,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:17:16,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:17:16,473 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:17:16,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:16 BoogieIcfgContainer [2021-10-13 07:17:16,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:17:16,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:17:16,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:17:16,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:17:16,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:15" (1/3) ... [2021-10-13 07:17:16,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722809ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:16, skipping insertion in model container [2021-10-13 07:17:16,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:15" (2/3) ... [2021-10-13 07:17:16,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722809ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:16, skipping insertion in model container [2021-10-13 07:17:16,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:16" (3/3) ... [2021-10-13 07:17:16,483 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2021-10-13 07:17:16,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:17:16,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:17:16,573 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:17:16,582 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:17:16,583 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:17:16,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:17:16,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:16,620 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:16,621 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2021-10-13 07:17:16,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:16,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004658120] [2021-10-13 07:17:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:16,665 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:16,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:16,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:16,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:17:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:16,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:17:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:16,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:16,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:16,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004658120] [2021-10-13 07:17:16,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004658120] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:16,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:16,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:17:16,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66461698] [2021-10-13 07:17:16,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:17:16,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:17:16,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:17:16,990 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:17,013 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2021-10-13 07:17:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:17:17,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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 16 [2021-10-13 07:17:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:17,025 INFO L225 Difference]: With dead ends: 48 [2021-10-13 07:17:17,026 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 07:17:17,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:17:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 07:17:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-13 07:17:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-13 07:17:17,072 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2021-10-13 07:17:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:17,073 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-13 07:17:17,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-13 07:17:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:17:17,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:17,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:17,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:17,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:17,289 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2021-10-13 07:17:17,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:17,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296048474] [2021-10-13 07:17:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:17,292 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:17,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:17,293 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:17,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:17:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:17,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:17:17,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:17,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:17,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:17,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296048474] [2021-10-13 07:17:17,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296048474] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:17,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:17,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:17:17,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837108291] [2021-10-13 07:17:17,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:17:17,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:17:17,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:17:17,511 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:17,612 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-10-13 07:17:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:17:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:17:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:17,616 INFO L225 Difference]: With dead ends: 58 [2021-10-13 07:17:17,616 INFO L226 Difference]: Without dead ends: 40 [2021-10-13 07:17:17,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:17:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-13 07:17:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-10-13 07:17:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-13 07:17:17,636 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-13 07:17:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:17,636 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-13 07:17:17,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-13 07:17:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:17:17,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:17,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:17,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 07:17:17,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:17,846 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:17,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:17,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1590720246, now seen corresponding path program 1 times [2021-10-13 07:17:17,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:17,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264211246] [2021-10-13 07:17:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:17,848 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:17,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:17,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:17,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:17:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:17:17,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:17:18,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:17:18,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:18,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264211246] [2021-10-13 07:17:18,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264211246] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:18,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2065642613] [2021-10-13 07:17:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:18,205 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:17:18,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:17:18,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:17:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:17:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:17:18,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:17:18,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2065642613] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:18,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180965228] [2021-10-13 07:17:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:18,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:17:18,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:18,628 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:17:18,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:17:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:18,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:17:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:17:18,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:17:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180965228] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:19,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:17:19,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [5, 5, 5, 5] total 12 [2021-10-13 07:17:19,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941716165] [2021-10-13 07:17:19,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:17:19,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:19,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:17:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:17:19,039 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:19,112 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-10-13 07:17:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:17:19,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 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 26 [2021-10-13 07:17:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:19,115 INFO L225 Difference]: With dead ends: 38 [2021-10-13 07:17:19,115 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:17:19,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:17:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:17:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:17:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:17:19,120 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-10-13 07:17:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:19,120 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:17:19,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:17:19,120 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:17:19,123 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:17:19,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:19,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:19,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:19,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:19,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:17:19,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:17:19,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:17:19,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:17:19,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:17:19,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:17:19,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:17:19,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:17:19,784 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2021-10-13 07:17:19,784 INFO L860 garLoopResultBuilder]: At program point L19-2(lines 18 23) the Hoare annotation is: true [2021-10-13 07:17:19,785 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:17:19,785 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:17:19,785 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:17:19,785 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2021-10-13 07:17:19,785 INFO L857 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2021-10-13 07:17:19,785 INFO L857 garLoopResultBuilder]: For program point L53-2(lines 53 65) no Hoare annotation was computed. [2021-10-13 07:17:19,786 INFO L857 garLoopResultBuilder]: For program point L37-2(lines 37 38) no Hoare annotation was computed. [2021-10-13 07:17:19,786 INFO L860 garLoopResultBuilder]: At program point L37-3(lines 37 38) the Hoare annotation is: true [2021-10-13 07:17:19,786 INFO L857 garLoopResultBuilder]: For program point L37-4(lines 37 38) no Hoare annotation was computed. [2021-10-13 07:17:19,786 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:17:19,786 INFO L857 garLoopResultBuilder]: For program point L33-2(lines 33 34) no Hoare annotation was computed. [2021-10-13 07:17:19,786 INFO L860 garLoopResultBuilder]: At program point L33-3(lines 33 34) the Hoare annotation is: true [2021-10-13 07:17:19,786 INFO L857 garLoopResultBuilder]: For program point L33-4(lines 33 34) no Hoare annotation was computed. [2021-10-13 07:17:19,787 INFO L857 garLoopResultBuilder]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2021-10-13 07:17:19,787 INFO L860 garLoopResultBuilder]: At program point L46-3(lines 46 47) the Hoare annotation is: true [2021-10-13 07:17:19,787 INFO L857 garLoopResultBuilder]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2021-10-13 07:17:19,787 INFO L857 garLoopResultBuilder]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2021-10-13 07:17:19,787 INFO L860 garLoopResultBuilder]: At program point L42-3(lines 42 43) the Hoare annotation is: true [2021-10-13 07:17:19,787 INFO L860 garLoopResultBuilder]: At program point L71(lines 28 72) the Hoare annotation is: true [2021-10-13 07:17:19,787 INFO L857 garLoopResultBuilder]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2021-10-13 07:17:19,788 INFO L857 garLoopResultBuilder]: For program point L55(lines 55 64) no Hoare annotation was computed. [2021-10-13 07:17:19,788 INFO L860 garLoopResultBuilder]: At program point L55-2(lines 53 65) the Hoare annotation is: true [2021-10-13 07:17:19,788 INFO L857 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2021-10-13 07:17:19,788 INFO L857 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2021-10-13 07:17:19,793 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:17:19,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:17:19 BoogieIcfgContainer [2021-10-13 07:17:19,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:17:19,800 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:17:19,800 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:17:19,800 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:17:19,801 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:16" (3/4) ... [2021-10-13 07:17:19,804 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:17:19,815 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-13 07:17:19,816 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:17:19,816 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:17:19,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:17:19,862 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:17:19,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:17:19,865 INFO L168 Benchmark]: Toolchain (without parser) took 4248.73 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 36.3 MB in the beginning and 40.7 MB in the end (delta: -4.3 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:19,865 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 58.7 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:19,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.48 ms. Allocated memory is still 58.7 MB. Free memory was 36.1 MB in the beginning and 25.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:19,866 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.36 ms. Allocated memory is still 58.7 MB. Free memory was 25.4 MB in the beginning and 23.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:19,867 INFO L168 Benchmark]: Boogie Preprocessor took 56.95 ms. Allocated memory is still 58.7 MB. Free memory was 23.6 MB in the beginning and 41.8 MB in the end (delta: -18.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:19,867 INFO L168 Benchmark]: RCFGBuilder took 507.82 ms. Allocated memory is still 58.7 MB. Free memory was 41.6 MB in the beginning and 30.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:19,868 INFO L168 Benchmark]: TraceAbstraction took 3322.66 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 29.5 MB in the beginning and 44.0 MB in the end (delta: -14.5 MB). Peak memory consumption was 1.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:19,868 INFO L168 Benchmark]: Witness Printer took 63.02 ms. Allocated memory is still 75.5 MB. Free memory was 44.0 MB in the beginning and 40.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:19,871 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 58.7 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 245.48 ms. Allocated memory is still 58.7 MB. Free memory was 36.1 MB in the beginning and 25.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.36 ms. Allocated memory is still 58.7 MB. Free memory was 25.4 MB in the beginning and 23.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.95 ms. Allocated memory is still 58.7 MB. Free memory was 23.6 MB in the beginning and 41.8 MB in the end (delta: -18.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * RCFGBuilder took 507.82 ms. Allocated memory is still 58.7 MB. Free memory was 41.6 MB in the beginning and 30.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3322.66 ms. Allocated memory was 58.7 MB in the beginning and 75.5 MB in the end (delta: 16.8 MB). Free memory was 29.5 MB in the beginning and 44.0 MB in the end (delta: -14.5 MB). Peak memory consumption was 1.6 MB. Max. memory is 16.1 GB. * Witness Printer took 63.02 ms. Allocated memory is still 75.5 MB. Free memory was 44.0 MB in the beginning and 40.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 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: 20]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3221.1ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 27.3ms, AutomataDifference: 251.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 45.9ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 73 SDtfs, 18 SDslu, 86 SDs, 0 SdLazy, 48 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 91.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 215 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 122.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 47.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 19 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 35.7ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 4.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 68.5ms SsaConstructionTime, 171.8ms SatisfiabilityAnalysisTime, 1070.7ms InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 297 SizeOfPredicates, 8 NumberOfNonLiveVariables, 289 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 32/48 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 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 07:17:19,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df88a6fe-3b20-405a-af9d-0b1d3919be1c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...