./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.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_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/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_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/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_6be20248-aaa1-4067-9c36-01c897c4fe4e/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 1cc9cf79891afa42e51c5a84218adbd4a63e1151 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/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_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/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_6be20248-aaa1-4067-9c36-01c897c4fe4e/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 1cc9cf79891afa42e51c5a84218adbd4a63e1151 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:46:28,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:46:28,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:46:28,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:46:28,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:46:28,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:46:28,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:46:28,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:46:28,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:46:28,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:46:28,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:46:28,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:46:28,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:46:28,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:46:28,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:46:28,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:46:28,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:46:28,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:46:28,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:46:28,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:46:28,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:46:28,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:46:28,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:46:28,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:46:28,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:46:28,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:46:28,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:46:28,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:46:28,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:46:28,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:46:28,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:46:28,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:46:28,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:46:28,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:46:28,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:46:28,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:46:28,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:46:28,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:46:28,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:46:28,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:46:28,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:46:28,524 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:46:28,560 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:46:28,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:46:28,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:46:28,567 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:46:28,568 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:46:28,568 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:46:28,568 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:46:28,568 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:46:28,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:46:28,569 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:46:28,570 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:46:28,571 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:46:28,571 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:46:28,571 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:46:28,572 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:46:28,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:46:28,573 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:46:28,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:46:28,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:46:28,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:46:28,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:46:28,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:46:28,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:46:28,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:46:28,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:46:28,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:46:28,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:46:28,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:46:28,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:46:28,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:46:28,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:46:28,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:46:28,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:46:28,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:46:28,580 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:46:28,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:46:28,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:46:28,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:46:28,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:46:28,582 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_6be20248-aaa1-4067-9c36-01c897c4fe4e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cc9cf79891afa42e51c5a84218adbd4a63e1151 [2021-10-16 02:46:28,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:46:28,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:46:28,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:46:28,928 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:46:28,929 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:46:28,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-16 02:46:29,017 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data/e30c953e8/e5feed7e8d084f3895ee6785c5d98bb1/FLAG3aee44edd [2021-10-16 02:46:29,573 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:46:29,573 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-16 02:46:29,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data/e30c953e8/e5feed7e8d084f3895ee6785c5d98bb1/FLAG3aee44edd [2021-10-16 02:46:29,934 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data/e30c953e8/e5feed7e8d084f3895ee6785c5d98bb1 [2021-10-16 02:46:29,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:46:29,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:46:29,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:46:29,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:46:29,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:46:29,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:46:29" (1/1) ... [2021-10-16 02:46:29,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3469591f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:29, skipping insertion in model container [2021-10-16 02:46:29,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:46:29" (1/1) ... [2021-10-16 02:46:29,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:46:29,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:46:30,175 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_6be20248-aaa1-4067-9c36-01c897c4fe4e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-16 02:46:30,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:46:30,204 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:46:30,216 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_6be20248-aaa1-4067-9c36-01c897c4fe4e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-16 02:46:30,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:46:30,239 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:46:30,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30 WrapperNode [2021-10-16 02:46:30,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:46:30,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:46:30,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:46:30,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:46:30,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:46:30,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:46:30,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:46:30,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:46:30,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:46:30,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:46:30,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:46:30,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:46:30,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (1/1) ... [2021-10-16 02:46:30,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:46:30,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:30,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:46:30,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:46:30,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:46:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:46:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:46:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:46:30,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:46:30,855 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:46:30,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:46:30 BoogieIcfgContainer [2021-10-16 02:46:30,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:46:30,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:46:30,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:46:30,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:46:30,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:46:29" (1/3) ... [2021-10-16 02:46:30,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba183ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:46:30, skipping insertion in model container [2021-10-16 02:46:30,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:30" (2/3) ... [2021-10-16 02:46:30,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba183ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:46:30, skipping insertion in model container [2021-10-16 02:46:30,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:46:30" (3/3) ... [2021-10-16 02:46:30,877 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2021-10-16 02:46:30,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:46:30,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 02:46:30,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:46:30,961 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:46:30,961 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 02:46:30,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:46:30,981 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:30,982 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:46:30,982 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash 100327247, now seen corresponding path program 1 times [2021-10-16 02:46:30,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:46:31,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893644387] [2021-10-16 02:46:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:31,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:46:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:31,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:46:31,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893644387] [2021-10-16 02:46:31,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893644387] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:31,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:31,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:46:31,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374378667] [2021-10-16 02:46:31,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:46:31,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:46:31,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:46:31,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:46:31,240 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:31,254 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-10-16 02:46:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:46:31,256 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-16 02:46:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:31,265 INFO L225 Difference]: With dead ends: 25 [2021-10-16 02:46:31,265 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 02:46:31,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:46:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 02:46:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 02:46:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 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 02:46:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-16 02:46:31,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2021-10-16 02:46:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:31,298 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-16 02:46:31,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-16 02:46:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:46:31,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:31,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:46:31,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:46:31,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash 99468274, now seen corresponding path program 1 times [2021-10-16 02:46:31,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:46:31,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137734613] [2021-10-16 02:46:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:31,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:46:31,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:46:31,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423025916] [2021-10-16 02:46:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:31,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:31,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:31,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:31,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:46:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:31,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:46:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:31,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:31,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:46:31,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137734613] [2021-10-16 02:46:31,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:46:31,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423025916] [2021-10-16 02:46:31,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423025916] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:31,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:31,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:46:31,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671122487] [2021-10-16 02:46:31,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:46:31,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:46:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:46:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:46:31,681 INFO L87 Difference]: Start difference. First operand 11 states and 12 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 02:46:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:31,747 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-16 02:46:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:46:31,748 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 02:46:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:31,748 INFO L225 Difference]: With dead ends: 25 [2021-10-16 02:46:31,749 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:46:31,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:46:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:46:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-10-16 02:46:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-16 02:46:31,755 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 5 [2021-10-16 02:46:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:31,755 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-16 02:46:31,755 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 02:46:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-16 02:46:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:46:31,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:31,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:46:31,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:31,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:31,973 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:31,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:31,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1211488473, now seen corresponding path program 1 times [2021-10-16 02:46:31,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:46:31,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544323966] [2021-10-16 02:46:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:31,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:46:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:32,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:46:32,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544323966] [2021-10-16 02:46:32,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544323966] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:32,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:32,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:46:32,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063546879] [2021-10-16 02:46:32,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:46:32,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:46:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:46:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:46:32,063 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:32,079 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-16 02:46:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:46:32,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:46:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:32,081 INFO L225 Difference]: With dead ends: 18 [2021-10-16 02:46:32,081 INFO L226 Difference]: Without dead ends: 14 [2021-10-16 02:46:32,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:46:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-16 02:46:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-16 02:46:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-16 02:46:32,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2021-10-16 02:46:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:32,087 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-16 02:46:32,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-16 02:46:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:46:32,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:32,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:32,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:46:32,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:32,090 INFO L82 PathProgramCache]: Analyzing trace with hash -263176832, now seen corresponding path program 1 times [2021-10-16 02:46:32,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:46:32,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410368849] [2021-10-16 02:46:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:32,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:46:32,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:46:32,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569228824] [2021-10-16 02:46:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:32,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:32,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:32,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:46:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:32,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:46:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:32,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:32,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:46:32,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410368849] [2021-10-16 02:46:32,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:46:32,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569228824] [2021-10-16 02:46:32,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569228824] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:32,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:32,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-10-16 02:46:32,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122941831] [2021-10-16 02:46:32,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:46:32,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:46:32,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:46:32,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:46:32,540 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:32,688 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-16 02:46:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:46:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:46:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:32,690 INFO L225 Difference]: With dead ends: 18 [2021-10-16 02:46:32,690 INFO L226 Difference]: Without dead ends: 12 [2021-10-16 02:46:32,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:46:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-16 02:46:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-16 02:46:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-16 02:46:32,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-10-16 02:46:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:32,698 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-16 02:46:32,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-16 02:46:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:46:32,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:32,700 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:32,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:32,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:32,913 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:32,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1349036158, now seen corresponding path program 1 times [2021-10-16 02:46:32,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:46:32,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912626956] [2021-10-16 02:46:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:32,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:46:32,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:46:32,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972788461] [2021-10-16 02:46:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:32,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:32,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:32,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:32,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:46:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:33,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:46:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:33,098 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 02:46:33,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:33,171 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 02:46:33,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:46:33,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912626956] [2021-10-16 02:46:33,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:46:33,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972788461] [2021-10-16 02:46:33,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972788461] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:33,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926119701] [2021-10-16 02:46:33,209 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-16 02:46:33,209 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:46:33,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:46:33,230 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:46:33,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:46:33,300 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.1 percent of original size [2021-10-16 02:46:33,320 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:46:33,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:33,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:46:33,326 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:46:33,327 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:33,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:46:33,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-16 02:46:33,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-16 02:46:33,402 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:33,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:46:33,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:33,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:46:33,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:46:33,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:33,437 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 02:46:33,439 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:33,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:46:33,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:33,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:46:33,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:46:33,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:46:33,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:33,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:33,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 159 [2021-10-16 02:46:33,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:46:33,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:312, output treesize:159 [2021-10-16 02:46:33,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:33,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:33,761 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_22| 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 02:46:33,765 INFO L168 Benchmark]: Toolchain (without parser) took 3814.85 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 76.0 MB in the beginning and 71.0 MB in the end (delta: 5.0 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:33,765 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 79.7 MB. Free memory is still 58.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:46:33,766 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.99 ms. Allocated memory is still 96.5 MB. Free memory was 76.0 MB in the beginning and 73.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:33,767 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.26 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:33,767 INFO L168 Benchmark]: Boogie Preprocessor took 59.66 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 70.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:33,768 INFO L168 Benchmark]: RCFGBuilder took 505.75 ms. Allocated memory is still 96.5 MB. Free memory was 70.5 MB in the beginning and 56.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:33,769 INFO L168 Benchmark]: TraceAbstraction took 2893.54 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 56.0 MB in the beginning and 71.0 MB in the end (delta: -15.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:33,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 79.7 MB. Free memory is still 58.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.99 ms. Allocated memory is still 96.5 MB. Free memory was 76.0 MB in the beginning and 73.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.26 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 71.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.66 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 70.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 505.75 ms. Allocated memory is still 96.5 MB. Free memory was 70.5 MB in the beginning and 56.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2893.54 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 56.0 MB in the beginning and 71.0 MB in the end (delta: -15.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_22| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_22|: 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 02:46:33,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/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 02:46:36,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:46:36,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:46:36,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:46:36,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:46:36,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:46:36,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:46:36,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:46:36,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:46:36,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:46:36,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:46:36,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:46:36,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:46:36,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:46:36,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:46:36,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:46:36,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:46:36,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:46:36,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:46:36,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:46:36,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:46:36,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:46:36,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:46:36,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:46:36,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:46:36,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:46:36,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:46:36,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:46:36,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:46:36,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:46:36,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:46:36,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:46:36,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:46:36,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:46:36,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:46:36,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:46:36,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:46:36,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:46:36,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:46:36,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:46:36,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:46:36,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:46:36,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:46:36,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:46:36,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:46:36,885 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:46:36,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:46:36,885 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:46:36,885 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:46:36,886 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:46:36,886 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:46:36,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:46:36,887 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:46:36,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:46:36,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:46:36,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:46:36,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:46:36,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:46:36,888 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:46:36,888 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:46:36,889 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:46:36,889 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:46:36,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:46:36,889 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:46:36,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:46:36,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:46:36,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:46:36,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:46:36,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:46:36,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:46:36,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:46:36,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:46:36,891 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:46:36,891 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:36,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:46:36,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:46:36,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:46:36,892 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_6be20248-aaa1-4067-9c36-01c897c4fe4e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cc9cf79891afa42e51c5a84218adbd4a63e1151 [2021-10-16 02:46:37,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:46:37,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:46:37,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:46:37,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:46:37,324 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:46:37,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-16 02:46:37,403 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data/4683c4fc6/3457a9e0b9cb45a4a2fd65618cf52a02/FLAGb8578ba71 [2021-10-16 02:46:37,889 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:46:37,890 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-16 02:46:37,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data/4683c4fc6/3457a9e0b9cb45a4a2fd65618cf52a02/FLAGb8578ba71 [2021-10-16 02:46:38,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/data/4683c4fc6/3457a9e0b9cb45a4a2fd65618cf52a02 [2021-10-16 02:46:38,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:46:38,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:46:38,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:46:38,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:46:38,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:46:38,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fc63fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38, skipping insertion in model container [2021-10-16 02:46:38,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:46:38,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:46:38,466 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_6be20248-aaa1-4067-9c36-01c897c4fe4e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-16 02:46:38,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:46:38,512 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:46:38,531 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_6be20248-aaa1-4067-9c36-01c897c4fe4e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-16 02:46:38,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:46:38,578 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:46:38,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38 WrapperNode [2021-10-16 02:46:38,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:46:38,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:46:38,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:46:38,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:46:38,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:46:38,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:46:38,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:46:38,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:46:38,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:46:38,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:46:38,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:46:38,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:46:38,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (1/1) ... [2021-10-16 02:46:38,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:46:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:38,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:46:38,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:46:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:46:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:46:38,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:46:38,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:46:39,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:46:39,193 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:46:39,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:46:39 BoogieIcfgContainer [2021-10-16 02:46:39,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:46:39,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:46:39,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:46:39,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:46:39,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:46:38" (1/3) ... [2021-10-16 02:46:39,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36171465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:46:39, skipping insertion in model container [2021-10-16 02:46:39,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:38" (2/3) ... [2021-10-16 02:46:39,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36171465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:46:39, skipping insertion in model container [2021-10-16 02:46:39,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:46:39" (3/3) ... [2021-10-16 02:46:39,204 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2021-10-16 02:46:39,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:46:39,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 02:46:39,298 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:46:39,306 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:46:39,307 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 02:46:39,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:46:39,326 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:39,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:39,327 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:39,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-10-16 02:46:39,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:39,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957412945] [2021-10-16 02:46:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:39,368 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:39,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:39,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:39,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:46:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:46:39,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:39,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:39,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:39,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957412945] [2021-10-16 02:46:39,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957412945] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:39,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:39,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:46:39,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079120979] [2021-10-16 02:46:39,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:46:39,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:46:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:46:39,684 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:39,703 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-16 02:46:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:46:39,705 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:46:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:39,715 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:46:39,715 INFO L226 Difference]: Without dead ends: 17 [2021-10-16 02:46:39,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:46:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-16 02:46:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-16 02:46:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 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 02:46:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-16 02:46:39,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-10-16 02:46:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:39,758 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-16 02:46:39,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-16 02:46:39,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:46:39,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:39,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:39,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:39,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:39,973 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:39,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-16 02:46:39,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:39,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719136754] [2021-10-16 02:46:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:39,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:39,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:39,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:39,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:46:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:40,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:46:40,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:40,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:40,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:40,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719136754] [2021-10-16 02:46:40,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719136754] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:40,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:40,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-16 02:46:40,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430462266] [2021-10-16 02:46:40,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:46:40,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:40,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:46:40,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:46:40,775 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 02:46:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:43,822 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-10-16 02:46:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:46:43,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 10 [2021-10-16 02:46:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:43,827 INFO L225 Difference]: With dead ends: 41 [2021-10-16 02:46:43,827 INFO L226 Difference]: Without dead ends: 39 [2021-10-16 02:46:43,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 594.9ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:46:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-16 02:46:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2021-10-16 02:46:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-16 02:46:43,837 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2021-10-16 02:46:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:43,838 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-16 02:46:43,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 02:46:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-16 02:46:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:46:43,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:43,839 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:43,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:44,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:44,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-10-16 02:46:44,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:44,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876126344] [2021-10-16 02:46:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:44,054 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:44,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:44,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:44,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:46:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:44,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:46:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:44,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:44,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:44,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876126344] [2021-10-16 02:46:44,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876126344] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:44,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:44,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:46:44,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304664991] [2021-10-16 02:46:44,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:46:44,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:44,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:46:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:46:44,265 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 02:46:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:44,367 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-10-16 02:46:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:46:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) Word has length 11 [2021-10-16 02:46:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:44,370 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:46:44,370 INFO L226 Difference]: Without dead ends: 35 [2021-10-16 02:46:44,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:46:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-16 02:46:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-10-16 02:46:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-10-16 02:46:44,403 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2021-10-16 02:46:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:44,404 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-10-16 02:46:44,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 02:46:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-10-16 02:46:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:46:44,407 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:44,407 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:44,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:44,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:44,624 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:44,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-10-16 02:46:44,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:44,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675150144] [2021-10-16 02:46:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:44,630 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:44,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:44,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:44,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:46:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:46:44,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:45,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:45,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:45,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675150144] [2021-10-16 02:46:45,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675150144] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:45,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:45,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-10-16 02:46:45,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777832841] [2021-10-16 02:46:45,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:46:45,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:45,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:46:45,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:46:45,794 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 02:46:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:47,299 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-16 02:46:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 02:46:47,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 13 [2021-10-16 02:46:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:47,303 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:46:47,303 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:46:47,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1345.6ms TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:46:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:46:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-16 02:46:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:46:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-10-16 02:46:47,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 13 [2021-10-16 02:46:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:47,314 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-10-16 02:46:47,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 02:46:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-10-16 02:46:47,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:46:47,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:47,316 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:47,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:47,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:47,531 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:46:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:47,531 INFO L82 PathProgramCache]: Analyzing trace with hash -558465920, now seen corresponding path program 1 times [2021-10-16 02:46:47,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:47,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959357898] [2021-10-16 02:46:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:47,533 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:47,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:47,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:47,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:46:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:46:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:48,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:49,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:49,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959357898] [2021-10-16 02:46:49,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959357898] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:49,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1879967675] [2021-10-16 02:46:49,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:49,698 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:49,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:46:49,703 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:46:49,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:46:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:46:49,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:50,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:50,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1879967675] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:50,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790076884] [2021-10-16 02:46:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:50,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:50,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:50,727 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:50,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:46:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:50,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:46:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:51,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:47:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:02,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790076884] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:47:02,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:47:02,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5, 5, 10, 6] total 20 [2021-10-16 02:47:02,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292669124] [2021-10-16 02:47:02,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:47:02,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:47:02,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:47:02,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=280, Unknown=5, NotChecked=0, Total=380 [2021-10-16 02:47:02,866 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 02:47:18,824 WARN L207 SmtUtils]: Spent 14.21 s on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-10-16 02:47:32,480 WARN L207 SmtUtils]: Spent 12.29 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-10-16 02:47:51,203 WARN L207 SmtUtils]: Spent 13.32 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-10-16 02:48:03,743 WARN L207 SmtUtils]: Spent 12.26 s on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-10-16 02:48:17,162 WARN L207 SmtUtils]: Spent 12.94 s on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-10-16 02:48:34,070 WARN L207 SmtUtils]: Spent 16.65 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-10-16 02:48:47,280 WARN L207 SmtUtils]: Spent 12.94 s on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-10-16 02:49:17,902 WARN L207 SmtUtils]: Spent 16.89 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-10-16 02:50:30,859 WARN L207 SmtUtils]: Spent 12.35 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-10-16 02:50:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:30,904 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2021-10-16 02:50:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-16 02:50:30,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) Word has length 15 [2021-10-16 02:50:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:30,910 INFO L225 Difference]: With dead ends: 110 [2021-10-16 02:50:30,911 INFO L226 Difference]: Without dead ends: 99 [2021-10-16 02:50:30,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 170468.0ms TimeCoverageRelationStatistics Valid=549, Invalid=1414, Unknown=17, NotChecked=0, Total=1980 [2021-10-16 02:50:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-16 02:50:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 55. [2021-10-16 02:50:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 54 states have internal predecessors, (74), 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 02:50:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2021-10-16 02:50:30,928 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 15 [2021-10-16 02:50:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:30,929 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2021-10-16 02:50:30,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 02:50:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2021-10-16 02:50:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:50:30,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:30,931 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:30,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-16 02:50:31,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:31,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:31,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:31,534 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:31,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1449988658, now seen corresponding path program 1 times [2021-10-16 02:50:31,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:31,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604793415] [2021-10-16 02:50:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:31,536 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:31,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:31,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:31,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:50:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:50:31,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:32,423 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 02:50:32,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:50:33,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:33,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604793415] [2021-10-16 02:50:33,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604793415] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:50:33,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:50:33,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-10-16 02:50:33,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103013664] [2021-10-16 02:50:33,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:50:33,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:50:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:50:33,797 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:34,736 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2021-10-16 02:50:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:50:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-16 02:50:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:34,740 INFO L225 Difference]: With dead ends: 59 [2021-10-16 02:50:34,740 INFO L226 Difference]: Without dead ends: 55 [2021-10-16 02:50:34,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1639.3ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:50:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-16 02:50:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-16 02:50:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 54 states have internal predecessors, (68), 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 02:50:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-10-16 02:50:34,755 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 18 [2021-10-16 02:50:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:34,756 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-10-16 02:50:34,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-10-16 02:50:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:50:34,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:34,758 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:34,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:34,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:34,975 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:34,975 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 1 times [2021-10-16 02:50:34,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:34,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385945967] [2021-10-16 02:50:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:34,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:34,977 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:34,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:50:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:50:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:35,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:35,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:35,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385945967] [2021-10-16 02:50:35,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385945967] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:35,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [784952112] [2021-10-16 02:50:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:35,510 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:35,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:35,512 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:35,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 02:50:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:50:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:35,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:36,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [784952112] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:36,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067903574] [2021-10-16 02:50:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:36,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:36,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:36,097 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:36,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 02:50:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:50:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:36,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:36,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067903574] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:36,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:36,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-16 02:50:36,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080743690] [2021-10-16 02:50:36,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:50:36,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:36,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:50:36,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:50:36,583 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:36,988 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2021-10-16 02:50:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:50:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:50:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:36,993 INFO L225 Difference]: With dead ends: 103 [2021-10-16 02:50:36,994 INFO L226 Difference]: Without dead ends: 99 [2021-10-16 02:50:36,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:50:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-16 02:50:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-10-16 02:50:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 1.231578947368421) internal successors, (117), 96 states have internal predecessors, (117), 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 02:50:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2021-10-16 02:50:37,016 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 21 [2021-10-16 02:50:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:37,016 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2021-10-16 02:50:37,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2021-10-16 02:50:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:50:37,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:37,019 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:37,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:37,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:37,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-10-16 02:50:37,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:37,624 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:37,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1513887678, now seen corresponding path program 1 times [2021-10-16 02:50:37,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:37,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818117278] [2021-10-16 02:50:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:37,625 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:37,626 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:37,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:50:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:37,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:50:37,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:37,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:38,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:38,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818117278] [2021-10-16 02:50:38,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818117278] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:38,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [247782528] [2021-10-16 02:50:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:38,090 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:38,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:38,091 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:38,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 02:50:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:50:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:38,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:38,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [247782528] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:38,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67717562] [2021-10-16 02:50:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:38,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:38,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:38,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:38,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 02:50:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:38,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:50:38,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:39,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:39,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67717562] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:39,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:39,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 8 [2021-10-16 02:50:39,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447609026] [2021-10-16 02:50:39,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:50:39,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:50:39,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:50:39,185 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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 02:50:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:39,368 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-10-16 02:50:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:50:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-16 02:50:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:39,373 INFO L225 Difference]: With dead ends: 158 [2021-10-16 02:50:39,374 INFO L226 Difference]: Without dead ends: 123 [2021-10-16 02:50:39,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:50:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-16 02:50:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2021-10-16 02:50:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 110 states have internal predecessors, (133), 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 02:50:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2021-10-16 02:50:39,397 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 25 [2021-10-16 02:50:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:39,398 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2021-10-16 02:50:39,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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 02:50:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2021-10-16 02:50:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:50:39,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:39,400 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:39,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:39,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:39,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:40,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:40,013 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1106341888, now seen corresponding path program 2 times [2021-10-16 02:50:40,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:40,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241466287] [2021-10-16 02:50:40,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:40,015 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:40,016 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:40,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:50:40,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:40,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 02:50:40,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:41,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:01,914 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_ULTIMATE.start_main_~y1~0 c_ULTIMATE.start_main_~x2~0))) (or (= (bvadd c_ULTIMATE.start_main_~y3~0 c_ULTIMATE.start_main_~x2~0 .cse0) (bvadd c_ULTIMATE.start_main_~x1~0 (_ bv1 32))) (not (= (bvadd c_ULTIMATE.start_main_~y2~0 (_ bv1 32)) c_ULTIMATE.start_main_~x2~0)) (not (= c_ULTIMATE.start_main_~x1~0 (bvadd c_ULTIMATE.start_main_~y2~0 c_ULTIMATE.start_main_~y3~0 .cse0))))) is different from true [2021-10-16 02:51:16,129 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_ULTIMATE.start_main_~y1~0 c_ULTIMATE.start_main_~x2~0))) (or (= (bvadd (_ bv2 32) c_ULTIMATE.start_main_~x1~0) (bvadd c_ULTIMATE.start_main_~y3~0 c_ULTIMATE.start_main_~x2~0 .cse0)) (not (= c_ULTIMATE.start_main_~x1~0 (bvadd c_ULTIMATE.start_main_~y2~0 c_ULTIMATE.start_main_~y3~0 .cse0))) (not (= c_ULTIMATE.start_main_~x2~0 (bvadd (_ bv2 32) c_ULTIMATE.start_main_~y2~0))))) is different from true [2021-10-16 02:51:38,917 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_ULTIMATE.start_main_~y1~0 c_ULTIMATE.start_main_~x2~0))) (or (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (= (bvadd (_ bv2 32) c_ULTIMATE.start_main_~x1~0) (bvadd c_ULTIMATE.start_main_~y3~0 c_ULTIMATE.start_main_~x2~0 .cse0)) (not (= c_ULTIMATE.start_main_~x1~0 (bvadd c_ULTIMATE.start_main_~y2~0 c_ULTIMATE.start_main_~y3~0 .cse0))) (not (= c_ULTIMATE.start_main_~x2~0 (bvadd (_ bv2 32) c_ULTIMATE.start_main_~y2~0))))) is different from true [2021-10-16 02:51:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2021-10-16 02:51:38,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:51:38,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241466287] [2021-10-16 02:51:38,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241466287] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:51:38,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1147717524] [2021-10-16 02:51:38,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:51:38,958 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:51:38,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:51:38,960 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:51:38,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-16 02:51:39,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:51:39,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:51:39,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-16 02:51:39,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:40,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2021-10-16 02:51:57,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1147717524] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:51:57,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157454035] [2021-10-16 02:51:57,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:51:57,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:51:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:51:57,485 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:51:57,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-16 02:51:58,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:51:58,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:51:58,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 02:51:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:51:59,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2021-10-16 02:52:16,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157454035] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:16,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:52:16,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14, 8, 14, 8] total 22 [2021-10-16 02:52:16,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046150286] [2021-10-16 02:52:16,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-16 02:52:16,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:52:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-16 02:52:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=249, Unknown=6, NotChecked=108, Total=462 [2021-10-16 02:52:16,024 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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 02:52:23,290 WARN L207 SmtUtils]: Spent 6.10 s on a formula simplification that was a NOOP. DAG size: 21 [2021-10-16 02:52:52,056 WARN L207 SmtUtils]: Spent 26.31 s on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-10-16 02:53:18,371 WARN L207 SmtUtils]: Spent 12.20 s on a formula simplification that was a NOOP. DAG size: 29 [2021-10-16 02:53:31,036 WARN L207 SmtUtils]: Spent 8.18 s on a formula simplification that was a NOOP. DAG size: 30 [2021-10-16 02:53:42,637 WARN L207 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 22 [2021-10-16 02:53:51,134 WARN L207 SmtUtils]: Spent 8.16 s on a formula simplification that was a NOOP. DAG size: 23 [2021-10-16 02:54:09,815 WARN L207 SmtUtils]: Spent 12.18 s on a formula simplification that was a NOOP. DAG size: 30 [2021-10-16 02:54:24,674 WARN L207 SmtUtils]: Spent 8.13 s on a formula simplification that was a NOOP. DAG size: 31 [2021-10-16 02:54:37,228 WARN L207 SmtUtils]: Spent 6.08 s on a formula simplification that was a NOOP. DAG size: 19 [2021-10-16 02:54:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:54:44,156 INFO L93 Difference]: Finished difference Result 144 states and 168 transitions. [2021-10-16 02:54:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 02:54:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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 25 [2021-10-16 02:54:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:54:44,162 INFO L225 Difference]: With dead ends: 144 [2021-10-16 02:54:44,162 INFO L226 Difference]: Without dead ends: 131 [2021-10-16 02:54:44,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 126 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 154243.5ms TimeCoverageRelationStatistics Valid=414, Invalid=979, Unknown=25, NotChecked=222, Total=1640 [2021-10-16 02:54:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-16 02:54:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-10-16 02:54:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 85 states have internal predecessors, (97), 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 02:54:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2021-10-16 02:54:44,195 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 25 [2021-10-16 02:54:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:54:44,197 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2021-10-16 02:54:44,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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 02:54:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2021-10-16 02:54:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-16 02:54:44,201 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:54:44,202 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:54:44,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:44,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:44,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:44,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:54:44,829 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:54:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:54:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash 888644486, now seen corresponding path program 3 times [2021-10-16 02:54:44,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:54:44,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486801967] [2021-10-16 02:54:44,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:54:44,830 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:54:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:54:44,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:54:44,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:54:45,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:54:45,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:54:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:54:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-16 02:54:47,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-16 02:54:49,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:54:49,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486801967] [2021-10-16 02:54:49,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486801967] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:49,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [475229485] [2021-10-16 02:54:49,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:54:49,227 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:54:49,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:54:49,233 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:54:49,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-16 02:54:50,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:54:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:54:50,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:54:50,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-16 02:54:53,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-16 02:54:54,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [475229485] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:54,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526536823] [2021-10-16 02:54:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:54:54,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:54:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:54:54,069 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:54:54,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-16 02:54:57,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:54:57,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:54:57,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:54:57,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-16 02:54:58,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-16 02:54:58,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526536823] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:58,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:54:58,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 9, 6, 9, 6] total 14 [2021-10-16 02:54:58,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190686484] [2021-10-16 02:54:58,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:54:58,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:54:58,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:54:58,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=130, Unknown=1, NotChecked=0, Total=182 [2021-10-16 02:54:58,377 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 02:55:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:55:07,744 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-10-16 02:55:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:55:07,747 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 35 [2021-10-16 02:55:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:55:07,748 INFO L225 Difference]: With dead ends: 90 [2021-10-16 02:55:07,748 INFO L226 Difference]: Without dead ends: 88 [2021-10-16 02:55:07,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 7651.7ms TimeCoverageRelationStatistics Valid=128, Invalid=291, Unknown=1, NotChecked=0, Total=420 [2021-10-16 02:55:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-16 02:55:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2021-10-16 02:55:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 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 02:55:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-10-16 02:55:07,766 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 35 [2021-10-16 02:55:07,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:55:07,767 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-10-16 02:55:07,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 02:55:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-10-16 02:55:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-16 02:55:07,769 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:07,769 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:07,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:07,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:08,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-16 02:55:08,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:55:08,374 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:55:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:55:08,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 2 times [2021-10-16 02:55:08,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:55:08,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83716942] [2021-10-16 02:55:08,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:55:08,375 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:55:08,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:55:08,377 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:55:08,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 02:55:08,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:55:08,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 02:55:08,946 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:55:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:55:09,226 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:55:09,226 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:55:09,227 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:55:09,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:55:09,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:09,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:55:09,447 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:55:09,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:55:09 BoogieIcfgContainer [2021-10-16 02:55:09,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:55:09,543 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:55:09,543 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:55:09,543 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:55:09,544 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:46:39" (3/4) ... [2021-10-16 02:55:09,546 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:55:09,643 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:55:09,644 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:55:09,645 INFO L168 Benchmark]: Toolchain (without parser) took 511397.48 ms. Allocated memory was 65.0 MB in the beginning and 88.1 MB in the end (delta: 23.1 MB). Free memory was 44.5 MB in the beginning and 40.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 27.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:55:09,645 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 65.0 MB. Free memory is still 45.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:55:09,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.49 ms. Allocated memory is still 65.0 MB. Free memory was 44.2 MB in the beginning and 46.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:55:09,646 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.84 ms. Allocated memory is still 65.0 MB. Free memory was 46.9 MB in the beginning and 45.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:55:09,647 INFO L168 Benchmark]: Boogie Preprocessor took 30.42 ms. Allocated memory is still 65.0 MB. Free memory was 45.3 MB in the beginning and 44.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:55:09,647 INFO L168 Benchmark]: RCFGBuilder took 545.01 ms. Allocated memory is still 65.0 MB. Free memory was 44.1 MB in the beginning and 34.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:55:09,648 INFO L168 Benchmark]: TraceAbstraction took 510344.88 ms. Allocated memory was 65.0 MB in the beginning and 88.1 MB in the end (delta: 23.1 MB). Free memory was 33.6 MB in the beginning and 43.8 MB in the end (delta: -10.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:55:09,649 INFO L168 Benchmark]: Witness Printer took 101.28 ms. Allocated memory is still 88.1 MB. Free memory was 43.8 MB in the beginning and 40.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:55:09,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 65.0 MB. Free memory is still 45.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 329.49 ms. Allocated memory is still 65.0 MB. Free memory was 44.2 MB in the beginning and 46.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.84 ms. Allocated memory is still 65.0 MB. Free memory was 46.9 MB in the beginning and 45.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.42 ms. Allocated memory is still 65.0 MB. Free memory was 45.3 MB in the beginning and 44.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 545.01 ms. Allocated memory is still 65.0 MB. Free memory was 44.1 MB in the beginning and 34.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 510344.88 ms. Allocated memory was 65.0 MB in the beginning and 88.1 MB in the end (delta: 23.1 MB). Free memory was 33.6 MB in the beginning and 43.8 MB in the end (delta: -10.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * Witness Printer took 101.28 ms. Allocated memory is still 88.1 MB. Free memory was 43.8 MB in the beginning and 40.3 MB in the end (delta: 3.6 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: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND FALSE !(counter++<5) [L16] COND TRUE !(cond) VAL [counter=6] [L18] reach_error() VAL [counter=6] - UnprovableResult [Line: 18]: 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, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 510147.9ms, OverallIterations: 11, TraceHistogramMax: 6, EmptinessCheckTime: 23.1ms, AutomataDifference: 371840.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 155 SDtfs, 564 SDslu, 544 SDs, 0 SdLazy, 618 SolverSat, 286 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 67480.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 904 GetRequests, 723 SyntacticMatches, 13 SemanticMatches, 168 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 336248.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=8, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 195.7ms AutomataMinimizationTime, 10 MinimizatonAttempts, 136 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 198.5ms SsaConstructionTime, 5162.0ms SatisfiabilityAnalysisTime, 123183.3ms InterpolantComputationTime, 461 NumberOfCodeBlocks, 401 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 810 ConstructedInterpolants, 7 QuantifiedInterpolants, 4576 SizeOfPredicates, 135 NumberOfNonLiveVariables, 1135 ConjunctsInSsa, 234 ConjunctsInUnsatCore, 40 InterpolantComputations, 9 PerfectInterpolantSequences, 518/758 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 02:55:09,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6be20248-aaa1-4067-9c36-01c897c4fe4e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...