./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.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_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/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_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/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_f1d2fb43-7255-4e37-8672-8490c4a55d94/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 f8d4c60b05266039fc5a952063ae52e513933a8f ..................................................................................................................................................................................................................................................................................................................................................................................................................... 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_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/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_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/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_f1d2fb43-7255-4e37-8672-8490c4a55d94/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 f8d4c60b05266039fc5a952063ae52e513933a8f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 01:54:31,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 01:54:31,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 01:54:31,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 01:54:31,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 01:54:31,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 01:54:31,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 01:54:31,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 01:54:31,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 01:54:31,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 01:54:31,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 01:54:31,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 01:54:31,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 01:54:31,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 01:54:31,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 01:54:31,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 01:54:31,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 01:54:31,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 01:54:31,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 01:54:31,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 01:54:31,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 01:54:31,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 01:54:31,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 01:54:31,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 01:54:31,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 01:54:31,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 01:54:31,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 01:54:31,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 01:54:31,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 01:54:31,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 01:54:31,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 01:54:31,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 01:54:31,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 01:54:31,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 01:54:31,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 01:54:31,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 01:54:31,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 01:54:31,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 01:54:31,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 01:54:31,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 01:54:31,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 01:54:31,526 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 01:54:31,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 01:54:31,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 01:54:31,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 01:54:31,577 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 01:54:31,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 01:54:31,578 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 01:54:31,578 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 01:54:31,578 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 01:54:31,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 01:54:31,579 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 01:54:31,586 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 01:54:31,586 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 01:54:31,586 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 01:54:31,587 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 01:54:31,587 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 01:54:31,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 01:54:31,588 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 01:54:31,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 01:54:31,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 01:54:31,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 01:54:31,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 01:54:31,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 01:54:31,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 01:54:31,589 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 01:54:31,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 01:54:31,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 01:54:31,590 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 01:54:31,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 01:54:31,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 01:54:31,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 01:54:31,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:31,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 01:54:31,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 01:54:31,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 01:54:31,593 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 01:54:31,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 01:54:31,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 01:54:31,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 01:54:31,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 01:54:31,594 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_f1d2fb43-7255-4e37-8672-8490c4a55d94/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d4c60b05266039fc5a952063ae52e513933a8f [2021-10-16 01:54:31,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 01:54:31,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 01:54:31,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 01:54:31,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 01:54:31,888 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 01:54:31,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2021-10-16 01:54:31,956 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data/163626437/cc412c89240c4a7aa8017efdf6fe4c73/FLAG04035f599 [2021-10-16 01:54:32,362 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 01:54:32,362 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2021-10-16 01:54:32,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data/163626437/cc412c89240c4a7aa8017efdf6fe4c73/FLAG04035f599 [2021-10-16 01:54:32,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data/163626437/cc412c89240c4a7aa8017efdf6fe4c73 [2021-10-16 01:54:32,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 01:54:32,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 01:54:32,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:32,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 01:54:32,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 01:54:32,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:32" (1/1) ... [2021-10-16 01:54:32,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5368aaae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:32, skipping insertion in model container [2021-10-16 01:54:32,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:32" (1/1) ... [2021-10-16 01:54:32,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 01:54:32,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 01:54:32,984 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_f1d2fb43-7255-4e37-8672-8490c4a55d94/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2021-10-16 01:54:33,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:33,008 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 01:54:33,021 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_f1d2fb43-7255-4e37-8672-8490c4a55d94/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2021-10-16 01:54:33,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:33,040 INFO L208 MainTranslator]: Completed translation [2021-10-16 01:54:33,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33 WrapperNode [2021-10-16 01:54:33,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:33,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:33,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 01:54:33,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 01:54:33,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:33,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 01:54:33,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 01:54:33,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 01:54:33,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 01:54:33,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 01:54:33,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 01:54:33,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 01:54:33,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (1/1) ... [2021-10-16 01:54:33,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:33,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:33,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 01:54:33,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 01:54:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 01:54:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 01:54:33,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 01:54:33,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 01:54:33,526 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 01:54:33,527 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 01:54:33,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:33 BoogieIcfgContainer [2021-10-16 01:54:33,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 01:54:33,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 01:54:33,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 01:54:33,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 01:54:33,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:54:32" (1/3) ... [2021-10-16 01:54:33,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56745220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:33, skipping insertion in model container [2021-10-16 01:54:33,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:33" (2/3) ... [2021-10-16 01:54:33,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56745220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:33, skipping insertion in model container [2021-10-16 01:54:33,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:33" (3/3) ... [2021-10-16 01:54:33,537 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound10.c [2021-10-16 01:54:33,542 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 01:54:33,557 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-16 01:54:33,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 01:54:33,637 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 01:54:33,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-16 01:54:33,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 01:54:33,663 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:33,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 01:54:33,664 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:33,676 INFO L82 PathProgramCache]: Analyzing trace with hash 93462408, now seen corresponding path program 1 times [2021-10-16 01:54:33,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:33,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106275251] [2021-10-16 01:54:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:33,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:33,828 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 01:54:33,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:33,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106275251] [2021-10-16 01:54:33,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106275251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:33,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:33,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 01:54:33,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508935347] [2021-10-16 01:54:33,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 01:54:33,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 01:54:33,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 01:54:33,852 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 01:54:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:33,865 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-10-16 01:54:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 01:54:33,866 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 01:54:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:33,874 INFO L225 Difference]: With dead ends: 33 [2021-10-16 01:54:33,874 INFO L226 Difference]: Without dead ends: 15 [2021-10-16 01:54:33,876 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 01:54:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-16 01:54:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-16 01:54:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 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 01:54:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-16 01:54:33,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-10-16 01:54:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:33,905 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-16 01:54:33,905 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 01:54:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-16 01:54:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 01:54:33,906 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:33,906 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 01:54:33,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 01:54:33,907 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash 92788139, now seen corresponding path program 1 times [2021-10-16 01:54:33,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:33,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114027467] [2021-10-16 01:54:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:33,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:33,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 01:54:33,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641919133] [2021-10-16 01:54:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:33,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:33,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:33,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:54:33,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 01:54:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 01:54:34,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:34,173 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 01:54:34,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:36,298 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 01:54:36,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:36,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114027467] [2021-10-16 01:54:36,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 01:54:36,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641919133] [2021-10-16 01:54:36,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641919133] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:36,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:36,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 01:54:36,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613057982] [2021-10-16 01:54:36,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 01:54:36,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 01:54:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-10-16 01:54:36,303 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 01:54:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:38,974 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-10-16 01:54:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 01:54:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 01:54:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:38,976 INFO L225 Difference]: With dead ends: 43 [2021-10-16 01:54:38,976 INFO L226 Difference]: Without dead ends: 32 [2021-10-16 01:54:38,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2097.4ms TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-16 01:54:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-16 01:54:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-10-16 01:54:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 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 01:54:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-10-16 01:54:38,987 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2021-10-16 01:54:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:38,988 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-10-16 01:54:38,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 01:54:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-10-16 01:54:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 01:54:38,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:38,991 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:39,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 01:54:39,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:39,210 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1170197384, now seen corresponding path program 1 times [2021-10-16 01:54:39,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:39,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300972017] [2021-10-16 01:54:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:39,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:39,225 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 01:54:39,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937640590] [2021-10-16 01:54:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:39,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:39,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:39,227 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:54:39,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 01:54:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 01:54:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:39,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:39,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:39,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300972017] [2021-10-16 01:54:39,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 01:54:39,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937640590] [2021-10-16 01:54:39,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937640590] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:54:39,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645544951] [2021-10-16 01:54:39,455 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-16 01:54:39,455 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 01:54:39,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 01:54:39,464 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 01:54:39,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 01:54:39,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:39,507 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 01:54:39,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:39,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 01:54:39,512 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 01:54:39,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:39,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 01:54:39,523 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-16 01:54:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 01:54:39,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 01:54:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 01:54:39,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 01:54:39,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:39,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 01:54:39,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:39,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 01:54:39,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 01:54:39,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-16 01:54:39,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:39,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 01:54:39,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:39,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 01:54:39,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 01:54:39,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 01:54:39,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:39,721 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.0 percent of original size [2021-10-16 01:54:39,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-16 01:54:39,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 01:54:39,725 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:300, output treesize:149 [2021-10-16 01:54:39,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 01:54:39,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:39,927 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_14| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 01:54:39,930 INFO L168 Benchmark]: Toolchain (without parser) took 7162.54 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 57.9 MB in the beginning and 62.5 MB in the end (delta: -4.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:39,931 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 100.7 MB. Free memory is still 74.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 01:54:39,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.33 ms. Allocated memory is still 100.7 MB. Free memory was 57.7 MB in the beginning and 74.9 MB in the end (delta: -17.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:39,932 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.07 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 73.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:39,933 INFO L168 Benchmark]: Boogie Preprocessor took 21.77 ms. Allocated memory is still 100.7 MB. Free memory was 73.1 MB in the beginning and 72.3 MB in the end (delta: 850.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:39,933 INFO L168 Benchmark]: RCFGBuilder took 428.88 ms. Allocated memory is still 100.7 MB. Free memory was 72.3 MB in the beginning and 60.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:39,934 INFO L168 Benchmark]: TraceAbstraction took 6398.74 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 60.1 MB in the beginning and 62.5 MB in the end (delta: -2.4 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:39,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 100.7 MB. Free memory is still 74.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 269.33 ms. Allocated memory is still 100.7 MB. Free memory was 57.7 MB in the beginning and 74.9 MB in the end (delta: -17.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.07 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 73.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.77 ms. Allocated memory is still 100.7 MB. Free memory was 73.1 MB in the beginning and 72.3 MB in the end (delta: 850.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 428.88 ms. Allocated memory is still 100.7 MB. Free memory was 72.3 MB in the beginning and 60.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6398.74 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 60.1 MB in the beginning and 62.5 MB in the end (delta: -2.4 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_14| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_14|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 01:54:39,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 01:54:42,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 01:54:42,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 01:54:42,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 01:54:42,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 01:54:42,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 01:54:42,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 01:54:42,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 01:54:42,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 01:54:42,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 01:54:42,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 01:54:42,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 01:54:42,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 01:54:42,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 01:54:42,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 01:54:42,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 01:54:42,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 01:54:42,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 01:54:42,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 01:54:42,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 01:54:42,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 01:54:42,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 01:54:42,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 01:54:42,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 01:54:42,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 01:54:42,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 01:54:42,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 01:54:42,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 01:54:42,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 01:54:42,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 01:54:42,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 01:54:42,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 01:54:42,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 01:54:42,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 01:54:42,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 01:54:42,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 01:54:42,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 01:54:42,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 01:54:42,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 01:54:42,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 01:54:42,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 01:54:42,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 01:54:42,528 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 01:54:42,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 01:54:42,529 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 01:54:42,530 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 01:54:42,530 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 01:54:42,530 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 01:54:42,530 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 01:54:42,531 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 01:54:42,531 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 01:54:42,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 01:54:42,532 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 01:54:42,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 01:54:42,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 01:54:42,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 01:54:42,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 01:54:42,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 01:54:42,533 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 01:54:42,533 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 01:54:42,533 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 01:54:42,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 01:54:42,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 01:54:42,534 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 01:54:42,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 01:54:42,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 01:54:42,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 01:54:42,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 01:54:42,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:42,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 01:54:42,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 01:54:42,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 01:54:42,536 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 01:54:42,536 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 01:54:42,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 01:54:42,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 01:54:42,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 01:54:42,537 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_f1d2fb43-7255-4e37-8672-8490c4a55d94/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d4c60b05266039fc5a952063ae52e513933a8f [2021-10-16 01:54:42,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 01:54:42,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 01:54:42,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 01:54:42,941 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 01:54:42,942 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 01:54:42,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2021-10-16 01:54:43,018 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data/49b11473f/1b07f323fbcd439787ec9d5662b1ecec/FLAGafd293ea5 [2021-10-16 01:54:43,516 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 01:54:43,517 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2021-10-16 01:54:43,524 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data/49b11473f/1b07f323fbcd439787ec9d5662b1ecec/FLAGafd293ea5 [2021-10-16 01:54:43,874 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/data/49b11473f/1b07f323fbcd439787ec9d5662b1ecec [2021-10-16 01:54:43,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 01:54:43,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 01:54:43,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:43,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 01:54:43,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 01:54:43,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:43" (1/1) ... [2021-10-16 01:54:43,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6c44cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:43, skipping insertion in model container [2021-10-16 01:54:43,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:43" (1/1) ... [2021-10-16 01:54:43,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 01:54:43,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 01:54:44,123 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_f1d2fb43-7255-4e37-8672-8490c4a55d94/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2021-10-16 01:54:44,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:44,155 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 01:54:44,168 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_f1d2fb43-7255-4e37-8672-8490c4a55d94/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2021-10-16 01:54:44,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:44,206 INFO L208 MainTranslator]: Completed translation [2021-10-16 01:54:44,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44 WrapperNode [2021-10-16 01:54:44,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:44,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:44,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 01:54:44,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 01:54:44,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:44,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 01:54:44,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 01:54:44,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 01:54:44,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 01:54:44,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 01:54:44,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 01:54:44,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 01:54:44,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (1/1) ... [2021-10-16 01:54:44,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:44,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:44,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 01:54:44,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 01:54:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 01:54:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 01:54:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 01:54:44,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 01:54:45,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 01:54:45,976 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 01:54:45,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:45 BoogieIcfgContainer [2021-10-16 01:54:45,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 01:54:45,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 01:54:45,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 01:54:45,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 01:54:45,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:54:43" (1/3) ... [2021-10-16 01:54:45,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b17ec79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:45, skipping insertion in model container [2021-10-16 01:54:45,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:44" (2/3) ... [2021-10-16 01:54:45,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b17ec79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:45, skipping insertion in model container [2021-10-16 01:54:45,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:45" (3/3) ... [2021-10-16 01:54:45,988 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound10.c [2021-10-16 01:54:45,994 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 01:54:45,994 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-16 01:54:46,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 01:54:46,045 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 01:54:46,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-16 01:54:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 21 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 01:54:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 01:54:46,064 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:46,064 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:46,065 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:46,070 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2021-10-16 01:54:46,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:54:46,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782820443] [2021-10-16 01:54:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:46,084 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:54:46,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:54:46,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:54:46,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 01:54:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 01:54:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:46,464 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 01:54:46,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:46,534 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 01:54:46,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:54:46,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782820443] [2021-10-16 01:54:46,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782820443] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:46,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:46,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 01:54:46,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610858166] [2021-10-16 01:54:46,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 01:54:46,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:54:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 01:54:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 01:54:46,565 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 01:54:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:46,583 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-10-16 01:54:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 01:54:46,585 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 01:54:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:46,593 INFO L225 Difference]: With dead ends: 41 [2021-10-16 01:54:46,593 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 01:54:46,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 01:54:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 01:54:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-16 01:54:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-16 01:54:46,628 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-10-16 01:54:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:46,629 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-16 01:54:46,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 01:54:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-16 01:54:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 01:54:46,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:46,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:46,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 01:54:46,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:54:46,846 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:46,847 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-16 01:54:46,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:54:46,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893708924] [2021-10-16 01:54:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:46,849 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:54:46,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:54:46,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:54:46,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 01:54:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 01:54:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:47,462 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 01:54:47,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:52,300 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 01:54:52,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:54:52,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893708924] [2021-10-16 01:54:52,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893708924] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:52,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:52,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 01:54:52,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598432089] [2021-10-16 01:54:52,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 01:54:52,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:54:52,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 01:54:52,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 01:54:52,324 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:03,170 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-10-16 01:55:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 01:55:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 01:55:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:03,207 INFO L225 Difference]: With dead ends: 46 [2021-10-16 01:55:03,207 INFO L226 Difference]: Without dead ends: 35 [2021-10-16 01:55:03,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6536.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-16 01:55:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-16 01:55:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-10-16 01:55:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 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 01:55:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-16 01:55:03,222 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 8 [2021-10-16 01:55:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:03,223 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-16 01:55:03,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-16 01:55:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 01:55:03,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:03,224 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:03,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:03,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:55:03,436 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2021-10-16 01:55:03,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:03,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747577568] [2021-10-16 01:55:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:03,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:03,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:03,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:03,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 01:55:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:03,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 01:55:03,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:04,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:04,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:04,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747577568] [2021-10-16 01:55:04,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747577568] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:04,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827734567] [2021-10-16 01:55:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:04,315 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:04,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:04,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:04,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 01:55:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:05,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 01:55:05,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:05,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:05,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1827734567] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:05,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803007854] [2021-10-16 01:55:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:05,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:05,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:05,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:05,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 01:55:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:05,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 01:55:05,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:05,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:06,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803007854] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:06,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:55:06,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-16 01:55:06,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001169098] [2021-10-16 01:55:06,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 01:55:06,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 01:55:06,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 01:55:06,074 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:09,248 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-10-16 01:55:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 01:55:09,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-16 01:55:09,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:09,250 INFO L225 Difference]: With dead ends: 58 [2021-10-16 01:55:09,250 INFO L226 Difference]: Without dead ends: 48 [2021-10-16 01:55:09,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-16 01:55:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-16 01:55:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-10-16 01:55:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-10-16 01:55:09,259 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 15 [2021-10-16 01:55:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:09,259 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-10-16 01:55:09,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-10-16 01:55:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 01:55:09,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:09,260 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:09,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-16 01:55:09,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:09,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:09,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:09,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 1 times [2021-10-16 01:55:09,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:09,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130268832] [2021-10-16 01:55:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:09,869 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:09,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:09,875 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:09,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 01:55:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:10,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 01:55:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:14,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-16 01:55:35,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:35,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130268832] [2021-10-16 01:55:35,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130268832] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:35,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1603374879] [2021-10-16 01:55:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:35,603 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:35,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:35,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:35,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 01:55:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 01:55:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:39,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-16 01:55:55,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1603374879] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:55,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210440509] [2021-10-16 01:55:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:55,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:55,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:55,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:55,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 01:55:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:56,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 01:55:56,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:56:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:56:00,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:56:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 01:56:18,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210440509] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:56:18,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:56:18,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6, 4, 8, 5] total 11 [2021-10-16 01:56:18,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162420090] [2021-10-16 01:56:18,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 01:56:18,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:56:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 01:56:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-16 01:56:18,095 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 01:56:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:56:37,787 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-10-16 01:56:37,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 01:56:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 01:56:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:56:37,789 INFO L225 Difference]: With dead ends: 44 [2021-10-16 01:56:37,789 INFO L226 Difference]: Without dead ends: 40 [2021-10-16 01:56:37,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 49836.1ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-16 01:56:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-16 01:56:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-10-16 01:56:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 01:56:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-16 01:56:37,797 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2021-10-16 01:56:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:56:37,797 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-16 01:56:37,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 01:56:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-16 01:56:37,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 01:56:37,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:56:37,798 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:56:37,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 01:56:38,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-16 01:56:38,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 01:56:38,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:56:38,426 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:56:38,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:56:38,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2021-10-16 01:56:38,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:56:38,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497785099] [2021-10-16 01:56:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:56:38,428 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:56:38,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:56:38,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:56:38,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 01:56:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:56:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 01:56:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:56:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:56:39,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:56:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:56:50,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:56:50,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497785099] [2021-10-16 01:56:50,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497785099] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:56:50,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417548390] [2021-10-16 01:56:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:56:50,184 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:56:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:56:50,185 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:56:50,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 01:56:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:56:51,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 01:56:51,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:56:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:56:51,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:56:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:56:58,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1417548390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:56:58,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484942627] [2021-10-16 01:56:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:56:58,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:56:58,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:56:58,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:56:58,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 01:56:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:56:59,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 01:56:59,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:56:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:56:59,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:57:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:57:05,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484942627] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:57:05,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:57:05,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 6, 8, 6] total 15 [2021-10-16 01:57:05,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826482826] [2021-10-16 01:57:05,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-16 01:57:05,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:57:05,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-16 01:57:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-16 01:57:05,776 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 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 01:58:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:58:11,857 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-10-16 01:58:11,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-16 01:58:11,869 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 01:58:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:58:11,870 INFO L225 Difference]: With dead ends: 50 [2021-10-16 01:58:11,870 INFO L226 Difference]: Without dead ends: 36 [2021-10-16 01:58:11,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 59499.7ms TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 01:58:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-16 01:58:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-10-16 01:58:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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 01:58:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-16 01:58:11,878 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2021-10-16 01:58:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:58:11,878 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-16 01:58:11,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 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 01:58:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-16 01:58:11,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 01:58:11,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:58:11,879 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:58:11,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 01:58:12,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 01:58:12,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 01:58:12,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:58:12,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:58:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:58:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1901162899, now seen corresponding path program 2 times [2021-10-16 01:58:12,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:58:12,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224396165] [2021-10-16 01:58:12,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:58:12,482 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:58:12,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:58:12,485 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:58:12,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 01:58:13,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:58:13,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:58:13,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 01:58:13,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:58:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:58:14,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:58:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:58:14,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:58:14,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224396165] [2021-10-16 01:58:14,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224396165] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:58:14,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1483521877] [2021-10-16 01:58:14,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:58:14,683 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:58:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:58:14,699 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:58:14,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 01:58:17,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:58:17,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:58:17,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 01:58:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:58:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:58:17,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:58:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:58:17,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1483521877] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:58:17,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768364663] [2021-10-16 01:58:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:58:17,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:58:17,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:58:17,448 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:58:17,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 01:58:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:58:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:58:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 01:58:18,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:58:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:58:19,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:58:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:58:19,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768364663] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:58:19,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:58:19,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-10-16 01:58:19,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474594910] [2021-10-16 01:58:19,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 01:58:19,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:58:19,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 01:58:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-16 01:58:19,379 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:58:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:58:27,601 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-10-16 01:58:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 01:58:27,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-16 01:58:27,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:58:27,603 INFO L225 Difference]: With dead ends: 88 [2021-10-16 01:58:27,603 INFO L226 Difference]: Without dead ends: 82 [2021-10-16 01:58:27,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1662.1ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-10-16 01:58:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-16 01:58:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2021-10-16 01:58:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:58:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-10-16 01:58:27,617 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 27 [2021-10-16 01:58:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:58:27,617 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-10-16 01:58:27,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:58:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-10-16 01:58:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 01:58:27,619 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:58:27,619 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:58:27,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 01:58:27,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 01:58:28,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-16 01:58:28,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:58:28,243 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:58:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:58:28,243 INFO L82 PathProgramCache]: Analyzing trace with hash -736656116, now seen corresponding path program 2 times [2021-10-16 01:58:28,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:58:28,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353522857] [2021-10-16 01:58:28,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:58:28,244 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:58:28,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:58:28,244 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:58:28,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 01:58:29,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:58:29,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:58:29,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 01:58:29,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:58:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:58:31,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:58:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:58:55,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:58:55,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353522857] [2021-10-16 01:58:55,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353522857] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:58:55,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1710529764] [2021-10-16 01:58:55,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:58:55,052 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:58:55,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:58:55,053 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:58:55,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-16 01:58:57,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:58:57,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:58:57,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 01:58:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:58:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:58:58,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:12,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1710529764] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:12,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255246747] [2021-10-16 01:59:12,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:59:12,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:59:12,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:59:12,117 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:59:12,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-16 01:59:13,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:59:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:59:13,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 01:59:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:59:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:14,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:59:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:59:26,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255246747] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:59:26,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:59:26,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 11, 9] total 20 [2021-10-16 01:59:26,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173912482] [2021-10-16 01:59:26,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 01:59:26,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:59:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 01:59:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-10-16 01:59:26,862 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 01:59:40,804 WARN L207 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-10-16 01:59:50,814 WARN L207 SmtUtils]: Spent 7.40 s on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-10-16 01:59:59,200 WARN L207 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-10-16 02:00:07,638 WARN L207 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-10-16 02:00:18,428 WARN L207 SmtUtils]: Spent 7.91 s on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-10-16 02:00:27,698 WARN L207 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-10-16 02:00:35,516 WARN L207 SmtUtils]: Spent 6.92 s on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-10-16 02:01:26,172 WARN L207 SmtUtils]: Spent 6.42 s on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-10-16 02:01:36,681 WARN L207 SmtUtils]: Spent 6.82 s on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-10-16 02:01:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:01:37,165 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-10-16 02:01:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-16 02:01:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 29 [2021-10-16 02:01:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:01:37,186 INFO L225 Difference]: With dead ends: 70 [2021-10-16 02:01:37,186 INFO L226 Difference]: Without dead ends: 60 [2021-10-16 02:01:37,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 126179.7ms TimeCoverageRelationStatistics Valid=627, Invalid=1823, Unknown=0, NotChecked=0, Total=2450 [2021-10-16 02:01:37,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-16 02:01:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-10-16 02:01:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 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 02:01:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-16 02:01:37,206 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 29 [2021-10-16 02:01:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:01:37,206 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-16 02:01:37,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 02:01:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-16 02:01:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-16 02:01:37,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:01:37,209 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:01:37,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-16 02:01:37,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:37,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-10-16 02:01:37,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:01:37,810 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:01:37,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:01:37,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1889161739, now seen corresponding path program 3 times [2021-10-16 02:01:37,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:01:37,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438916592] [2021-10-16 02:01:37,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:01:37,811 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:01:37,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:01:37,812 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:01:37,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:01:43,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-16 02:01:43,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 02:01:43,495 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:01:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:01:47,848 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:01:47,849 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:01:47,850 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:01:47,852 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:01:47,852 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:01:47,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:48,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:01:48,072 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:01:48,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:01:48 BoogieIcfgContainer [2021-10-16 02:01:48,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:01:48,140 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:01:48,140 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:01:48,140 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:01:48,141 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:45" (3/4) ... [2021-10-16 02:01:48,143 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:01:48,225 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:01:48,225 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:01:48,227 INFO L168 Benchmark]: Toolchain (without parser) took 424348.44 ms. Allocated memory is still 71.3 MB. Free memory was 49.0 MB in the beginning and 28.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:48,227 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory is still 34.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:01:48,228 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.44 ms. Allocated memory is still 71.3 MB. Free memory was 48.9 MB in the beginning and 54.7 MB in the end (delta: -5.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:48,228 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.05 ms. Allocated memory is still 71.3 MB. Free memory was 54.7 MB in the beginning and 53.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:48,229 INFO L168 Benchmark]: Boogie Preprocessor took 26.17 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 51.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:01:48,229 INFO L168 Benchmark]: RCFGBuilder took 1677.90 ms. Allocated memory is still 71.3 MB. Free memory was 51.9 MB in the beginning and 41.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:48,230 INFO L168 Benchmark]: TraceAbstraction took 422159.69 ms. Allocated memory is still 71.3 MB. Free memory was 41.1 MB in the beginning and 33.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:48,230 INFO L168 Benchmark]: Witness Printer took 85.71 ms. Allocated memory is still 71.3 MB. Free memory was 33.6 MB in the beginning and 28.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:48,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory is still 34.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.44 ms. Allocated memory is still 71.3 MB. Free memory was 48.9 MB in the beginning and 54.7 MB in the end (delta: -5.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.05 ms. Allocated memory is still 71.3 MB. Free memory was 54.7 MB in the beginning and 53.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.17 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 51.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1677.90 ms. Allocated memory is still 71.3 MB. Free memory was 51.9 MB in the beginning and 41.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 422159.69 ms. Allocated memory is still 71.3 MB. Free memory was 41.1 MB in the beginning and 33.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Witness Printer took 85.71 ms. Allocated memory is still 71.3 MB. Free memory was 33.6 MB in the beginning and 28.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=3] [L28] EXPR counter++ VAL [counter=4] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=4] [L28] EXPR counter++ VAL [counter=5] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=5] [L28] EXPR counter++ VAL [counter=6] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=6] [L28] EXPR counter++ VAL [counter=7] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=7] [L28] EXPR counter++ VAL [counter=8] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=8] [L28] EXPR counter++ VAL [counter=9] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=9] [L28] EXPR counter++ VAL [counter=10] [L28] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=10] [L28] EXPR counter++ VAL [counter=11] [L28] COND FALSE !(counter++<10) [L10] COND FALSE !(!(cond)) VAL [counter=11] [L10] COND TRUE !(cond) VAL [counter=11] [L12] reach_error() VAL [counter=11] - UnprovableResult [Line: 12]: 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: 12]: 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, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 422032.6ms, OverallIterations: 8, TraceHistogramMax: 11, EmptinessCheckTime: 14.9ms, AutomataDifference: 238454.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 474 SDslu, 480 SDs, 0 SdLazy, 436 SolverSat, 272 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 52177.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 706 GetRequests, 556 SyntacticMatches, 10 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 244063.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, InterpolantAutomatonStates: 110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 84.5ms AutomataMinimizationTime, 7 MinimizatonAttempts, 75 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 169.5ms SsaConstructionTime, 19032.8ms SatisfiabilityAnalysisTime, 153628.0ms InterpolantComputationTime, 379 NumberOfCodeBlocks, 379 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 622 ConstructedInterpolants, 4 QuantifiedInterpolants, 8634 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1030 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 25/528 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 02:01:48,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1d2fb43-7255-4e37-8672-8490c4a55d94/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...