./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd8d8af301e4791886ec1ff9f4a142cca0e3e497 .............................................................................................................................................................................................................................................................................................................................. 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_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd8d8af301e4791886ec1ff9f4a142cca0e3e497 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:40:15,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:40:15,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:40:15,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:40:15,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:40:15,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:40:15,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:40:15,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:40:15,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:40:15,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:40:15,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:40:15,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:40:15,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:40:15,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:40:15,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:40:15,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:40:15,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:40:15,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:40:15,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:40:15,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:40:15,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:40:15,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:40:15,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:40:15,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:40:15,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:40:15,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:40:15,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:40:15,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:40:15,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:40:15,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:40:15,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:40:15,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:40:15,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:40:15,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:40:15,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:40:15,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:40:15,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:40:15,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:40:15,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:40:15,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:40:15,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:40:15,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:40:15,754 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:40:15,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:40:15,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:40:15,756 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:40:15,757 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:40:15,757 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:40:15,757 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:40:15,757 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:40:15,764 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:40:15,764 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:40:15,765 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:40:15,765 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:40:15,766 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:40:15,766 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:40:15,766 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:40:15,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:40:15,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:40:15,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:40:15,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:40:15,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:40:15,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:40:15,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:40:15,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:40:15,769 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:40:15,769 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:40:15,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:40:15,769 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:40:15,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:40:15,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:40:15,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:40:15,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:40:15,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:40:15,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:40:15,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:40:15,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:40:15,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:40:15,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:40:15,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:40:15,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:40:15,774 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_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd8d8af301e4791886ec1ff9f4a142cca0e3e497 [2021-10-16 02:40:16,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:40:16,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:40:16,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:40:16,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:40:16,094 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:40:16,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2021-10-16 02:40:16,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data/faa907829/e40d47885405449b8e40f42d88a2907c/FLAG47d24fd00 [2021-10-16 02:40:16,758 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:40:16,758 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2021-10-16 02:40:16,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data/faa907829/e40d47885405449b8e40f42d88a2907c/FLAG47d24fd00 [2021-10-16 02:40:17,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data/faa907829/e40d47885405449b8e40f42d88a2907c [2021-10-16 02:40:17,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:40:17,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:40:17,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:40:17,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:40:17,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:40:17,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d2f498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17, skipping insertion in model container [2021-10-16 02:40:17,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:40:17,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:40:17,374 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_5bfdbf93-111d-46c7-930d-4502333f7a12/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2021-10-16 02:40:17,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:40:17,418 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:40:17,434 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_5bfdbf93-111d-46c7-930d-4502333f7a12/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2021-10-16 02:40:17,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:40:17,467 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:40:17,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17 WrapperNode [2021-10-16 02:40:17,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:40:17,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:40:17,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:40:17,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:40:17,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:40:17,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:40:17,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:40:17,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:40:17,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:40:17,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:40:17,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:40:17,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:40:17,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (1/1) ... [2021-10-16 02:40:17,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:40:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:17,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:40:17,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:40:17,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:40:17,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:40:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:40:17,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:40:17,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:40:17,979 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-16 02:40:17,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:17 BoogieIcfgContainer [2021-10-16 02:40:17,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:40:17,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:40:17,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:40:18,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:40:18,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:40:17" (1/3) ... [2021-10-16 02:40:18,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fa37e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:40:18, skipping insertion in model container [2021-10-16 02:40:18,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:17" (2/3) ... [2021-10-16 02:40:18,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fa37e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:40:18, skipping insertion in model container [2021-10-16 02:40:18,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:17" (3/3) ... [2021-10-16 02:40:18,005 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2021-10-16 02:40:18,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:40:18,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-16 02:40:18,091 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:40:18,098 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:40:18,099 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-16 02:40:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:40:18,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:18,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:40:18,121 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:40:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:18,134 INFO L82 PathProgramCache]: Analyzing trace with hash 114241630, now seen corresponding path program 1 times [2021-10-16 02:40:18,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:40:18,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082939641] [2021-10-16 02:40:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:18,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:40:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:18,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:40:18,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082939641] [2021-10-16 02:40:18,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082939641] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:18,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:18,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:40:18,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046409115] [2021-10-16 02:40:18,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:40:18,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:40:18,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:40:18,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:40:18,324 INFO L87 Difference]: Start difference. First operand has 29 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:18,342 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-10-16 02:40:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:40:18,344 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-16 02:40:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:18,353 INFO L225 Difference]: With dead ends: 57 [2021-10-16 02:40:18,353 INFO L226 Difference]: Without dead ends: 27 [2021-10-16 02:40:18,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:40:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-16 02:40:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-16 02:40:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-16 02:40:18,406 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 5 [2021-10-16 02:40:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:18,407 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-16 02:40:18,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-16 02:40:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:40:18,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:18,408 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:40:18,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:40:18,409 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:40:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:18,410 INFO L82 PathProgramCache]: Analyzing trace with hash 112890113, now seen corresponding path program 1 times [2021-10-16 02:40:18,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:40:18,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476975886] [2021-10-16 02:40:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:18,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:40:18,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:40:18,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375452230] [2021-10-16 02:40:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:18,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:18,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:18,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:40:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:40:18,494 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:40:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:40:18,543 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 02:40:18,543 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:40:18,545 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:40:18,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:40:18,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:40:18,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:40:18,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:40:18,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:40:18,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:18,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:18,777 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:40:18,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:40:18 BoogieIcfgContainer [2021-10-16 02:40:18,798 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:40:18,801 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:40:18,801 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:40:18,802 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:40:18,802 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:17" (3/4) ... [2021-10-16 02:40:18,809 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:40:18,809 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:40:18,815 INFO L168 Benchmark]: Toolchain (without parser) took 1641.74 ms. Allocated memory is still 100.7 MB. Free memory was 74.0 MB in the beginning and 68.4 MB in the end (delta: 5.6 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:18,816 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory was 50.0 MB in the beginning and 50.0 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:40:18,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.73 ms. Allocated memory is still 100.7 MB. Free memory was 73.8 MB in the beginning and 63.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:18,822 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.15 ms. Allocated memory is still 100.7 MB. Free memory was 63.3 MB in the beginning and 61.5 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:40:18,823 INFO L168 Benchmark]: Boogie Preprocessor took 42.01 ms. Allocated memory is still 100.7 MB. Free memory was 61.5 MB in the beginning and 60.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:18,824 INFO L168 Benchmark]: RCFGBuilder took 420.98 ms. Allocated memory is still 100.7 MB. Free memory was 60.3 MB in the beginning and 49.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:18,824 INFO L168 Benchmark]: TraceAbstraction took 814.98 ms. Allocated memory is still 100.7 MB. Free memory was 48.7 MB in the beginning and 68.8 MB in the end (delta: -20.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:40:18,825 INFO L168 Benchmark]: Witness Printer took 8.37 ms. Allocated memory is still 100.7 MB. Free memory was 68.8 MB in the beginning and 68.4 MB in the end (delta: 429.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:18,828 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 81.8 MB. Free memory was 50.0 MB in the beginning and 50.0 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.73 ms. Allocated memory is still 100.7 MB. Free memory was 73.8 MB in the beginning and 63.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.15 ms. Allocated memory is still 100.7 MB. Free memory was 63.3 MB in the beginning and 61.5 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.01 ms. Allocated memory is still 100.7 MB. Free memory was 61.5 MB in the beginning and 60.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 420.98 ms. Allocated memory is still 100.7 MB. Free memory was 60.3 MB in the beginning and 49.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 814.98 ms. Allocated memory is still 100.7 MB. Free memory was 48.7 MB in the beginning and 68.8 MB in the end (delta: -20.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 8.37 ms. Allocated memory is still 100.7 MB. Free memory was 68.8 MB in the beginning and 68.4 MB in the end (delta: 429.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<50 [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 686.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 9.6ms, AutomataDifference: 48.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 12.3ms SsaConstructionTime, 42.7ms SatisfiabilityAnalysisTime, 51.2ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-16 02:40:18,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:40:21,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:40:21,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:40:21,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:40:21,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:40:21,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:40:21,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:40:21,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:40:21,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:40:21,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:40:21,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:40:21,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:40:21,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:40:21,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:40:21,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:40:21,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:40:21,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:40:21,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:40:21,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:40:21,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:40:21,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:40:21,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:40:21,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:40:21,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:40:21,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:40:21,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:40:21,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:40:21,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:40:21,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:40:21,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:40:21,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:40:21,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:40:21,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:40:21,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:40:21,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:40:21,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:40:21,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:40:21,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:40:21,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:40:21,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:40:21,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:40:21,458 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:40:21,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:40:21,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:40:21,514 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:40:21,514 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:40:21,514 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:40:21,515 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:40:21,515 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:40:21,515 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:40:21,515 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:40:21,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:40:21,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:40:21,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:40:21,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:40:21,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:40:21,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:40:21,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:40:21,520 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:40:21,520 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:40:21,520 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:40:21,521 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:40:21,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:40:21,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:40:21,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:40:21,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:40:21,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:40:21,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:40:21,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:40:21,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:40:21,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:40:21,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:40:21,523 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:40:21,524 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:21,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:40:21,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:40:21,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:40:21,525 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_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd8d8af301e4791886ec1ff9f4a142cca0e3e497 [2021-10-16 02:40:21,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:40:21,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:40:21,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:40:21,971 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:40:21,972 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:40:21,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2021-10-16 02:40:22,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data/761695b4a/758e2d210dee4a3f847e0e03ac61f4c8/FLAG9f6569265 [2021-10-16 02:40:22,632 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:40:22,638 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2021-10-16 02:40:22,647 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data/761695b4a/758e2d210dee4a3f847e0e03ac61f4c8/FLAG9f6569265 [2021-10-16 02:40:22,949 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/data/761695b4a/758e2d210dee4a3f847e0e03ac61f4c8 [2021-10-16 02:40:22,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:40:22,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:40:22,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:40:22,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:40:22,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:40:22,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:40:22" (1/1) ... [2021-10-16 02:40:22,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88a2d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:22, skipping insertion in model container [2021-10-16 02:40:22,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:40:22" (1/1) ... [2021-10-16 02:40:22,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:40:22,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:40:23,181 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_5bfdbf93-111d-46c7-930d-4502333f7a12/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2021-10-16 02:40:23,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:40:23,276 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:40:23,292 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_5bfdbf93-111d-46c7-930d-4502333f7a12/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2021-10-16 02:40:23,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:40:23,341 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:40:23,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23 WrapperNode [2021-10-16 02:40:23,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:40:23,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:40:23,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:40:23,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:40:23,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:40:23,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:40:23,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:40:23,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:40:23,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:40:23,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:40:23,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:40:23,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:40:23,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (1/1) ... [2021-10-16 02:40:23,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:40:23,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:23,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:40:23,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:40:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:40:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:40:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:40:23,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:40:34,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:40:34,836 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-16 02:40:34,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:34 BoogieIcfgContainer [2021-10-16 02:40:34,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:40:34,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:40:34,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:40:34,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:40:34,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:40:22" (1/3) ... [2021-10-16 02:40:34,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d9ed53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:40:34, skipping insertion in model container [2021-10-16 02:40:34,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:23" (2/3) ... [2021-10-16 02:40:34,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d9ed53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:40:34, skipping insertion in model container [2021-10-16 02:40:34,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:34" (3/3) ... [2021-10-16 02:40:34,846 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2021-10-16 02:40:34,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:40:34,853 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-16 02:40:34,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:40:34,926 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:40:34,926 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-16 02:40:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 25 states have (on average 1.6) internal successors, (40), 31 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) [2021-10-16 02:40:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:40:34,945 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:34,946 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:40:34,947 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:40:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2021-10-16 02:40:34,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:34,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941512587] [2021-10-16 02:40:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:34,966 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:34,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:34,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:34,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:40:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:35,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:40:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:35,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:35,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:35,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941512587] [2021-10-16 02:40:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941512587] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:35,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:35,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:40:35,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150009788] [2021-10-16 02:40:35,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:40:35,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:40:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:40:35,247 INFO L87 Difference]: Start difference. First operand has 32 states, 25 states have (on average 1.6) internal successors, (40), 31 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:35,265 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2021-10-16 02:40:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:40:35,266 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:40:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:35,274 INFO L225 Difference]: With dead ends: 62 [2021-10-16 02:40:35,275 INFO L226 Difference]: Without dead ends: 28 [2021-10-16 02:40:35,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:40:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-16 02:40:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-16 02:40:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 27 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) [2021-10-16 02:40:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-16 02:40:35,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2021-10-16 02:40:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:35,310 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-16 02:40:35,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-16 02:40:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:40:35,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:35,311 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:40:35,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:35,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:35,527 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:40:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-16 02:40:35,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:35,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119322250] [2021-10-16 02:40:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:35,530 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:35,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:35,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:35,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:40:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:40:35,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:36,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:44,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:44,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119322250] [2021-10-16 02:40:44,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119322250] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:44,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:44,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:40:44,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719005470] [2021-10-16 02:40:44,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:40:44,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:40:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:40:44,830 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:06,989 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-10-16 02:41:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:41:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:41:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:06,992 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:41:06,992 INFO L226 Difference]: Without dead ends: 35 [2021-10-16 02:41:06,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6856.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:41:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-16 02:41:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-10-16 02:41:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-10-16 02:41:07,002 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 6 [2021-10-16 02:41:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:07,003 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-10-16 02:41:07,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-10-16 02:41:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:41:07,005 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:07,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:07,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:07,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:41:07,216 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:41:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:07,218 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-10-16 02:41:07,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:41:07,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368706117] [2021-10-16 02:41:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:07,221 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:41:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:41:07,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:41:07,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:41:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:08,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:41:08,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:41:11,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:17,917 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) is different from false [2021-10-16 02:41:19,961 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) is different from true [2021-10-16 02:41:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:41:45,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:41:45,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368706117] [2021-10-16 02:41:45,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368706117] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:41:45,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:41:45,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-16 02:41:45,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817166122] [2021-10-16 02:41:45,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:41:45,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:41:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:41:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=29, Unknown=3, NotChecked=10, Total=56 [2021-10-16 02:41:45,631 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:55,217 WARN L207 SmtUtils]: Spent 5.14 s on a formula simplification that was a NOOP. DAG size: 14 [2021-10-16 02:42:00,408 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~r~0 (_ bv1 32)) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) (= c_currentRoundingMode roundNearestTiesToEven) (forall ((v_ULTIMATE.start_main_~a~0_11 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (let ((.cse1 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)) v_ULTIMATE.start_main_~a~0_11))) (fp.sub c_currentRoundingMode .cse1 .cse1))) (_ bv0 32)))) is different from true [2021-10-16 02:42:03,531 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~r~0 (_ bv1 32)) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-10-16 02:43:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:01,713 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-10-16 02:43:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:43:01,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:43:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:01,715 INFO L225 Difference]: With dead ends: 36 [2021-10-16 02:43:01,715 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:43:01,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33931.7ms TimeCoverageRelationStatistics Valid=26, Invalid=53, Unknown=5, NotChecked=48, Total=132 [2021-10-16 02:43:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:43:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-10-16 02:43:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 30 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) [2021-10-16 02:43:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-10-16 02:43:01,724 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2021-10-16 02:43:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:01,724 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-10-16 02:43:01,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-10-16 02:43:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:43:01,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:01,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:01,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:01,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:43:01,940 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:43:01,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:01,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1248817364, now seen corresponding path program 1 times [2021-10-16 02:43:01,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:01,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606219509] [2021-10-16 02:43:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:01,942 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:01,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:01,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:01,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:43:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:43:02,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:43:02,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:43:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:02,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:43:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:43:02,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:43:02,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606219509] [2021-10-16 02:43:02,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606219509] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:43:02,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:43:02,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:43:02,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386236556] [2021-10-16 02:43:02,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:43:02,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:43:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:43:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:43:02,687 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:43:04,511 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-10-16 02:43:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:43:04,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 02:43:04,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:43:04,513 INFO L225 Difference]: With dead ends: 64 [2021-10-16 02:43:04,513 INFO L226 Difference]: Without dead ends: 50 [2021-10-16 02:43:04,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:43:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-16 02:43:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2021-10-16 02:43:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-16 02:43:04,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 9 [2021-10-16 02:43:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:43:04,525 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-16 02:43:04,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:43:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-16 02:43:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:43:04,527 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:43:04,527 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:43:04,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:04,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:43:04,750 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-16 02:43:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:43:04,750 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-10-16 02:43:04,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:43:04,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944964051] [2021-10-16 02:43:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:43:04,751 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:43:04,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:43:04,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:43:04,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:43:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:43:06,310 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:43:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:43:08,508 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:43:08,508 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:43:08,509 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:43:08,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:43:08,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:43:08,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:43:08,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:43:08,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:43:08,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:08,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:43:08,719 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:43:08,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:43:08 BoogieIcfgContainer [2021-10-16 02:43:08,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:43:08,762 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:43:08,763 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:43:08,763 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:43:08,764 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:34" (3/4) ... [2021-10-16 02:43:08,766 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:43:08,827 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:43:08,827 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:43:08,829 INFO L168 Benchmark]: Toolchain (without parser) took 165866.53 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 40.4 MB in the beginning and 27.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 26.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,830 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 60.8 MB. Free memory is still 40.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:43:08,832 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.94 ms. Allocated memory is still 60.8 MB. Free memory was 40.2 MB in the beginning and 41.9 MB in the end (delta: -1.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,833 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.64 ms. Allocated memory is still 60.8 MB. Free memory was 41.9 MB in the beginning and 40.0 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:43:08,834 INFO L168 Benchmark]: Boogie Preprocessor took 31.42 ms. Allocated memory is still 60.8 MB. Free memory was 40.0 MB in the beginning and 38.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:43:08,834 INFO L168 Benchmark]: RCFGBuilder took 11391.03 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 27.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,835 INFO L168 Benchmark]: TraceAbstraction took 153922.82 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 27.0 MB in the beginning and 29.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,846 INFO L168 Benchmark]: Witness Printer took 64.94 ms. Allocated memory is still 75.5 MB. Free memory was 29.5 MB in the beginning and 27.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:08,850 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 60.8 MB. Free memory is still 40.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 378.94 ms. Allocated memory is still 60.8 MB. Free memory was 40.2 MB in the beginning and 41.9 MB in the end (delta: -1.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.64 ms. Allocated memory is still 60.8 MB. Free memory was 41.9 MB in the beginning and 40.0 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.42 ms. Allocated memory is still 60.8 MB. Free memory was 40.0 MB in the beginning and 38.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 11391.03 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 27.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 153922.82 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 27.0 MB in the beginning and 29.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * Witness Printer took 64.94 ms. Allocated memory is still 75.5 MB. Free memory was 29.5 MB in the beginning and 27.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<50 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 153800.8ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 11.6ms, AutomataDifference: 100124.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 104 SDtfs, 68 SDslu, 171 SDs, 0 SdLazy, 110 SolverSat, 21 SolverUnsat, 26 SolverUnknown, 0 SolverNotchecked, 81210.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 41012.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 37.3ms SsaConstructionTime, 3607.4ms SatisfiabilityAnalysisTime, 46462.9ms InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 50 ConstructedInterpolants, 1 QuantifiedInterpolants, 320 SizeOfPredicates, 10 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 02:43:09,084 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-16 02:43:09,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bfdbf93-111d-46c7-930d-4502333f7a12/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...