./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.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_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/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_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/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_b73fee52-e1fb-4703-bd53-621944f66777/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 5b57e964dbb610d8a39ef60225ec1dbb75ce4568 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/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_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/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_b73fee52-e1fb-4703-bd53-621944f66777/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 5b57e964dbb610d8a39ef60225ec1dbb75ce4568 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:34:31,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:34:31,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:34:31,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:34:31,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:34:31,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:34:31,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:34:31,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:34:31,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:34:31,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:34:31,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:34:31,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:34:31,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:34:31,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:34:31,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:34:31,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:34:31,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:34:31,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:34:31,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:34:31,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:34:31,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:34:31,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:34:31,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:34:31,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:34:31,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:34:31,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:34:31,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:34:31,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:34:31,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:34:31,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:34:31,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:34:31,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:34:31,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:34:31,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:34:31,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:34:31,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:34:31,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:34:31,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:34:31,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:34:31,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:34:31,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:34:31,910 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:34:31,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:34:31,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:34:31,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:34:31,954 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:34:31,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:34:31,955 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:34:31,955 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:34:31,955 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:34:31,961 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:34:31,962 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:34:31,963 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:34:31,963 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:34:31,964 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:34:31,964 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:34:31,964 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:34:31,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:34:31,965 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:34:31,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:34:31,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:34:31,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:34:31,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:34:31,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:34:31,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:34:31,967 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:34:31,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:34:31,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:34:31,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:34:31,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:34:31,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:34:31,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:34:31,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:34:31,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:34:31,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:34:31,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:34:31,971 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:34:31,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:34:31,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:34:31,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:34:31,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:34:31,972 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_b73fee52-e1fb-4703-bd53-621944f66777/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b57e964dbb610d8a39ef60225ec1dbb75ce4568 [2021-10-16 02:34:32,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:34:32,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:34:32,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:34:32,315 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:34:32,315 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:34:32,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2021-10-16 02:34:32,394 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data/e302679fb/f0d795c4b53941d8ae067a35e049d59e/FLAG0fde60eb8 [2021-10-16 02:34:33,017 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:34:33,018 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2021-10-16 02:34:33,038 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data/e302679fb/f0d795c4b53941d8ae067a35e049d59e/FLAG0fde60eb8 [2021-10-16 02:34:33,342 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data/e302679fb/f0d795c4b53941d8ae067a35e049d59e [2021-10-16 02:34:33,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:34:33,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:34:33,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:34:33,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:34:33,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:34:33,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@412331ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33, skipping insertion in model container [2021-10-16 02:34:33,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:34:33,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:34:33,612 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1224,1237] [2021-10-16 02:34:33,617 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1636,1649] [2021-10-16 02:34:33,641 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1851,1864] [2021-10-16 02:34:33,644 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2384,2397] [2021-10-16 02:34:33,646 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2599,2612] [2021-10-16 02:34:33,648 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2901,2914] [2021-10-16 02:34:33,649 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3116,3129] [2021-10-16 02:34:33,657 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3386,3399] [2021-10-16 02:34:33,663 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3604,3617] [2021-10-16 02:34:33,673 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4088,4101] [2021-10-16 02:34:33,676 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4306,4319] [2021-10-16 02:34:33,680 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4802,4815] [2021-10-16 02:34:33,685 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5203,5216] [2021-10-16 02:34:33,687 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5421,5434] [2021-10-16 02:34:33,689 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5792,5805] [2021-10-16 02:34:33,690 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6010,6023] [2021-10-16 02:34:33,692 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6296,6309] [2021-10-16 02:34:33,693 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6514,6527] [2021-10-16 02:34:33,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:34:33,708 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:34:33,724 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1224,1237] [2021-10-16 02:34:33,727 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1636,1649] [2021-10-16 02:34:33,728 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1851,1864] [2021-10-16 02:34:33,731 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2384,2397] [2021-10-16 02:34:33,732 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2599,2612] [2021-10-16 02:34:33,734 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2901,2914] [2021-10-16 02:34:33,736 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3116,3129] [2021-10-16 02:34:33,738 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3386,3399] [2021-10-16 02:34:33,740 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3604,3617] [2021-10-16 02:34:33,743 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4088,4101] [2021-10-16 02:34:33,747 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4306,4319] [2021-10-16 02:34:33,751 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4802,4815] [2021-10-16 02:34:33,755 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5203,5216] [2021-10-16 02:34:33,757 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5421,5434] [2021-10-16 02:34:33,759 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5792,5805] [2021-10-16 02:34:33,760 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6010,6023] [2021-10-16 02:34:33,762 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6296,6309] [2021-10-16 02:34:33,764 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6514,6527] [2021-10-16 02:34:33,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:34:33,782 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:34:33,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33 WrapperNode [2021-10-16 02:34:33,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:34:33,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:34:33,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:34:33,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:34:33,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:34:33,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:34:33,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:34:33,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:34:33,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:34:33,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:34:33,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:34:33,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:34:33,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (1/1) ... [2021-10-16 02:34:33,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:34:33,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:34:33,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:34:33,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:34:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:34:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:34:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:34:33,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:34:34,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:34:34,452 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-16 02:34:34,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:34:34 BoogieIcfgContainer [2021-10-16 02:34:34,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:34:34,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:34:34,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:34:34,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:34:34,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:34:33" (1/3) ... [2021-10-16 02:34:34,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@312335d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:34:34, skipping insertion in model container [2021-10-16 02:34:34,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:33" (2/3) ... [2021-10-16 02:34:34,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@312335d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:34:34, skipping insertion in model container [2021-10-16 02:34:34,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:34:34" (3/3) ... [2021-10-16 02:34:34,463 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+lhb-reducer.c [2021-10-16 02:34:34,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:34:34,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-16 02:34:34,519 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:34:34,526 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 02:34:34,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-10-16 02:34:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 72 states have internal predecessors, (102), 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 02:34:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:34:34,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:34,578 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:34,579 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash -101219053, now seen corresponding path program 1 times [2021-10-16 02:34:34,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:34,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195097260] [2021-10-16 02:34:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:34,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:34,977 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 02:34:34,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:34,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195097260] [2021-10-16 02:34:34,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195097260] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:34,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:34,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:34:34,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61655783] [2021-10-16 02:34:35,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:34:35,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:35,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:34:35,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:34:35,030 INFO L87 Difference]: Start difference. First operand has 73 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 72 states have internal predecessors, (102), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:35,239 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2021-10-16 02:34:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:34:35,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:34:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:35,256 INFO L225 Difference]: With dead ends: 118 [2021-10-16 02:34:35,257 INFO L226 Difference]: Without dead ends: 106 [2021-10-16 02:34:35,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-16 02:34:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 68. [2021-10-16 02:34:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.411764705882353) internal successors, (72), 67 states have internal predecessors, (72), 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 02:34:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-10-16 02:34:35,302 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 7 [2021-10-16 02:34:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:35,302 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-10-16 02:34:35,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-10-16 02:34:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:34:35,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:35,304 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:35,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:34:35,305 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash -104789997, now seen corresponding path program 1 times [2021-10-16 02:34:35,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:35,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381995403] [2021-10-16 02:34:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:35,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:35,432 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 02:34:35,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:35,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381995403] [2021-10-16 02:34:35,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381995403] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:35,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:35,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:34:35,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477886544] [2021-10-16 02:34:35,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:34:35,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:35,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:34:35,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:34:35,446 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:35,563 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-10-16 02:34:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:34:35,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:34:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:35,568 INFO L225 Difference]: With dead ends: 106 [2021-10-16 02:34:35,568 INFO L226 Difference]: Without dead ends: 104 [2021-10-16 02:34:35,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-16 02:34:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2021-10-16 02:34:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 1.4) internal successors, (70), 65 states have internal predecessors, (70), 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 02:34:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-10-16 02:34:35,588 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 7 [2021-10-16 02:34:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:35,589 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-10-16 02:34:35,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-10-16 02:34:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:34:35,591 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:35,591 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:35,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:34:35,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:35,599 INFO L82 PathProgramCache]: Analyzing trace with hash -345778017, now seen corresponding path program 1 times [2021-10-16 02:34:35,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:35,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519337390] [2021-10-16 02:34:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:35,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:35,703 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 02:34:35,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:35,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519337390] [2021-10-16 02:34:35,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519337390] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:35,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:35,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:34:35,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554236337] [2021-10-16 02:34:35,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:34:35,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:35,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:34:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:35,707 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 02:34:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:35,838 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-10-16 02:34:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:34:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 02:34:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:35,847 INFO L225 Difference]: With dead ends: 68 [2021-10-16 02:34:35,848 INFO L226 Difference]: Without dead ends: 66 [2021-10-16 02:34:35,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-16 02:34:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-10-16 02:34:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 63 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 02:34:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-10-16 02:34:35,873 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 10 [2021-10-16 02:34:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:35,873 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-10-16 02:34:35,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 02:34:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-10-16 02:34:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:34:35,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:35,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:35,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:34:35,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash 646297484, now seen corresponding path program 1 times [2021-10-16 02:34:35,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:35,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264129911] [2021-10-16 02:34:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:35,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:35,955 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 02:34:35,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:35,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264129911] [2021-10-16 02:34:35,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264129911] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:35,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:35,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:34:35,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749804890] [2021-10-16 02:34:35,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:34:35,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:35,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:34:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:35,959 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 02:34:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:36,048 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-10-16 02:34:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:34:36,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 02:34:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:36,049 INFO L225 Difference]: With dead ends: 66 [2021-10-16 02:34:36,049 INFO L226 Difference]: Without dead ends: 64 [2021-10-16 02:34:36,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-16 02:34:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-10-16 02:34:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.375) internal successors, (66), 61 states have internal predecessors, (66), 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 02:34:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-10-16 02:34:36,056 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-10-16 02:34:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:36,056 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-10-16 02:34:36,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 02:34:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-10-16 02:34:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:34:36,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:36,057 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:36,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:34:36,058 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2129179748, now seen corresponding path program 1 times [2021-10-16 02:34:36,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:36,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426452521] [2021-10-16 02:34:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:36,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:34:36,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:36,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426452521] [2021-10-16 02:34:36,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426452521] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:36,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:36,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:34:36,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856958890] [2021-10-16 02:34:36,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:34:36,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:36,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:34:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:34:36,105 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 02:34:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:36,174 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-10-16 02:34:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:34:36,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2021-10-16 02:34:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:36,177 INFO L225 Difference]: With dead ends: 64 [2021-10-16 02:34:36,177 INFO L226 Difference]: Without dead ends: 60 [2021-10-16 02:34:36,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-16 02:34:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-10-16 02:34:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 57 states have internal predecessors, (62), 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 02:34:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-10-16 02:34:36,193 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 11 [2021-10-16 02:34:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:36,194 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-10-16 02:34:36,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 02:34:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-10-16 02:34:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:34:36,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:36,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:36,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:34:36,196 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:36,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2128691176, now seen corresponding path program 1 times [2021-10-16 02:34:36,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:36,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333824903] [2021-10-16 02:34:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:36,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:36,261 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 02:34:36,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:36,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333824903] [2021-10-16 02:34:36,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333824903] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:36,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:36,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:34:36,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026241889] [2021-10-16 02:34:36,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:34:36,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:36,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:34:36,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:36,265 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 02:34:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:36,381 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-10-16 02:34:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:34:36,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 11 [2021-10-16 02:34:36,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:36,383 INFO L225 Difference]: With dead ends: 94 [2021-10-16 02:34:36,384 INFO L226 Difference]: Without dead ends: 92 [2021-10-16 02:34:36,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-16 02:34:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2021-10-16 02:34:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 55 states have internal predecessors, (60), 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 02:34:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-10-16 02:34:36,389 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 11 [2021-10-16 02:34:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:36,389 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-10-16 02:34:36,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 02:34:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-10-16 02:34:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:34:36,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:36,390 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:36,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:34:36,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2128675288, now seen corresponding path program 1 times [2021-10-16 02:34:36,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:36,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577419347] [2021-10-16 02:34:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:36,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:34:36,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:36,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577419347] [2021-10-16 02:34:36,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577419347] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:36,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:36,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:34:36,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545210809] [2021-10-16 02:34:36,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:34:36,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:34:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:36,495 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 02:34:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:36,691 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2021-10-16 02:34:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:34:36,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 11 [2021-10-16 02:34:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:36,692 INFO L225 Difference]: With dead ends: 99 [2021-10-16 02:34:36,692 INFO L226 Difference]: Without dead ends: 97 [2021-10-16 02:34:36,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-16 02:34:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2021-10-16 02:34:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-10-16 02:34:36,698 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 11 [2021-10-16 02:34:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:36,698 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-10-16 02:34:36,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 02:34:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-10-16 02:34:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:34:36,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:36,700 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:36,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:34:36,700 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1439610404, now seen corresponding path program 1 times [2021-10-16 02:34:36,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:36,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832292106] [2021-10-16 02:34:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:36,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:36,758 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 02:34:36,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:36,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832292106] [2021-10-16 02:34:36,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832292106] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:36,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:36,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:34:36,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473973889] [2021-10-16 02:34:36,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:34:36,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:34:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:34:36,771 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 02:34:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:36,821 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-10-16 02:34:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:34:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2021-10-16 02:34:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:36,823 INFO L225 Difference]: With dead ends: 56 [2021-10-16 02:34:36,823 INFO L226 Difference]: Without dead ends: 52 [2021-10-16 02:34:36,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-16 02:34:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-10-16 02:34:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.35) internal successors, (54), 49 states have internal predecessors, (54), 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 02:34:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-10-16 02:34:36,830 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 11 [2021-10-16 02:34:36,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:36,830 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-10-16 02:34:36,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 02:34:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-10-16 02:34:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:34:36,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:36,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:36,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:34:36,832 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1564912810, now seen corresponding path program 1 times [2021-10-16 02:34:36,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:36,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147391752] [2021-10-16 02:34:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:36,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:37,033 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 02:34:37,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:37,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147391752] [2021-10-16 02:34:37,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147391752] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:37,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:37,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 02:34:37,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261707105] [2021-10-16 02:34:37,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:34:37,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:37,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:34:37,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:37,038 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:37,180 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-10-16 02:34:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:34:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:34:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:37,182 INFO L225 Difference]: With dead ends: 117 [2021-10-16 02:34:37,182 INFO L226 Difference]: Without dead ends: 115 [2021-10-16 02:34:37,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:34:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-16 02:34:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 55. [2021-10-16 02:34:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 54 states have internal predecessors, (60), 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 02:34:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-10-16 02:34:37,199 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 12 [2021-10-16 02:34:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:37,200 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-16 02:34:37,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,200 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-10-16 02:34:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:34:37,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:37,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:37,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:34:37,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1564420266, now seen corresponding path program 1 times [2021-10-16 02:34:37,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:37,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086244377] [2021-10-16 02:34:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:37,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:37,346 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 02:34:37,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:37,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086244377] [2021-10-16 02:34:37,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086244377] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:37,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:37,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 02:34:37,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333537283] [2021-10-16 02:34:37,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:34:37,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:34:37,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:37,348 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:37,496 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-10-16 02:34:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:34:37,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:34:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:37,498 INFO L225 Difference]: With dead ends: 115 [2021-10-16 02:34:37,498 INFO L226 Difference]: Without dead ends: 113 [2021-10-16 02:34:37,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:34:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-16 02:34:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 57. [2021-10-16 02:34:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 56 states have internal predecessors, (62), 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 02:34:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-10-16 02:34:37,504 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 12 [2021-10-16 02:34:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:37,504 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-10-16 02:34:37,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-10-16 02:34:37,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:34:37,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:37,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:37,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 02:34:37,506 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:37,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1661195103, now seen corresponding path program 1 times [2021-10-16 02:34:37,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:37,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362146091] [2021-10-16 02:34:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:37,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:37,542 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 02:34:37,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:37,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362146091] [2021-10-16 02:34:37,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362146091] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:37,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:37,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:34:37,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333721546] [2021-10-16 02:34:37,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:34:37,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:37,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:34:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:37,545 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:37,624 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-10-16 02:34:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:34:37,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:34:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:37,625 INFO L225 Difference]: With dead ends: 75 [2021-10-16 02:34:37,626 INFO L226 Difference]: Without dead ends: 73 [2021-10-16 02:34:37,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-16 02:34:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-10-16 02:34:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 54 states have internal predecessors, (60), 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 02:34:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-10-16 02:34:37,630 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 12 [2021-10-16 02:34:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:37,631 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-10-16 02:34:37,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-10-16 02:34:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:34:37,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:37,632 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:37,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 02:34:37,632 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1659471199, now seen corresponding path program 1 times [2021-10-16 02:34:37,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:37,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687906703] [2021-10-16 02:34:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:37,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:37,666 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 02:34:37,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:37,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687906703] [2021-10-16 02:34:37,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687906703] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:37,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:37,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:34:37,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998001231] [2021-10-16 02:34:37,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:34:37,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:34:37,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:37,669 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:37,746 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-10-16 02:34:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:34:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:34:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:37,747 INFO L225 Difference]: With dead ends: 56 [2021-10-16 02:34:37,747 INFO L226 Difference]: Without dead ends: 54 [2021-10-16 02:34:37,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-16 02:34:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-10-16 02:34:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.288888888888889) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-10-16 02:34:37,751 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 12 [2021-10-16 02:34:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:37,752 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-10-16 02:34:37,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-10-16 02:34:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:34:37,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:37,753 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:37,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 02:34:37,753 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:37,754 INFO L82 PathProgramCache]: Analyzing trace with hash 42563455, now seen corresponding path program 1 times [2021-10-16 02:34:37,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:37,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888674842] [2021-10-16 02:34:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:37,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:37,851 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 02:34:37,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888674842] [2021-10-16 02:34:37,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888674842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:37,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:37,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 02:34:37,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931446612] [2021-10-16 02:34:37,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:34:37,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:37,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:34:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:37,853 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:37,955 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-10-16 02:34:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:34:37,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:34:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:37,958 INFO L225 Difference]: With dead ends: 91 [2021-10-16 02:34:37,958 INFO L226 Difference]: Without dead ends: 89 [2021-10-16 02:34:37,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:34:37,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-16 02:34:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2021-10-16 02:34:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 58 states have internal predecessors, (66), 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 02:34:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-10-16 02:34:37,964 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 13 [2021-10-16 02:34:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:37,965 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-10-16 02:34:37,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-10-16 02:34:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:34:37,965 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:37,965 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:37,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-16 02:34:37,966 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:37,966 INFO L82 PathProgramCache]: Analyzing trace with hash 44110600, now seen corresponding path program 1 times [2021-10-16 02:34:37,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:37,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598117967] [2021-10-16 02:34:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:37,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:37,996 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 02:34:37,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:37,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598117967] [2021-10-16 02:34:37,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598117967] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:37,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:37,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:34:37,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864308632] [2021-10-16 02:34:37,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:34:37,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:34:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:37,998 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:38,077 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-10-16 02:34:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:34:38,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:34:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:38,079 INFO L225 Difference]: With dead ends: 79 [2021-10-16 02:34:38,079 INFO L226 Difference]: Without dead ends: 77 [2021-10-16 02:34:38,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-16 02:34:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2021-10-16 02:34:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.28) internal successors, (64), 56 states have internal predecessors, (64), 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 02:34:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-10-16 02:34:38,084 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 13 [2021-10-16 02:34:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:38,084 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-10-16 02:34:38,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-10-16 02:34:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:34:38,085 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:38,085 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:38,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-16 02:34:38,086 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:38,086 INFO L82 PathProgramCache]: Analyzing trace with hash 96004535, now seen corresponding path program 1 times [2021-10-16 02:34:38,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:38,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213499289] [2021-10-16 02:34:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:38,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:38,193 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 02:34:38,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:38,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213499289] [2021-10-16 02:34:38,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213499289] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:38,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:38,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 02:34:38,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97394003] [2021-10-16 02:34:38,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:34:38,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:38,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:34:38,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:38,196 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:38,279 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-10-16 02:34:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:34:38,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:34:38,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:38,281 INFO L225 Difference]: With dead ends: 69 [2021-10-16 02:34:38,281 INFO L226 Difference]: Without dead ends: 65 [2021-10-16 02:34:38,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:34:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-16 02:34:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-10-16 02:34:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-16 02:34:38,288 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 13 [2021-10-16 02:34:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:38,289 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-16 02:34:38,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-16 02:34:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:34:38,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:38,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:38,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-16 02:34:38,290 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:38,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:38,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1367432731, now seen corresponding path program 1 times [2021-10-16 02:34:38,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:38,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854705096] [2021-10-16 02:34:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:38,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:38,421 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 02:34:38,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:38,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854705096] [2021-10-16 02:34:38,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854705096] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:38,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:38,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-16 02:34:38,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352420415] [2021-10-16 02:34:38,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:34:38,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:38,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:34:38,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:38,427 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:38,537 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-10-16 02:34:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:34:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 02:34:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:38,538 INFO L225 Difference]: With dead ends: 86 [2021-10-16 02:34:38,538 INFO L226 Difference]: Without dead ends: 84 [2021-10-16 02:34:38,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:34:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-16 02:34:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2021-10-16 02:34:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 60 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 02:34:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-10-16 02:34:38,544 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 14 [2021-10-16 02:34:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:38,544 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-10-16 02:34:38,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-10-16 02:34:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:34:38,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:38,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:38,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-16 02:34:38,545 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:38,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2046065374, now seen corresponding path program 1 times [2021-10-16 02:34:38,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:38,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584710179] [2021-10-16 02:34:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:38,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:38,573 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 02:34:38,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:38,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584710179] [2021-10-16 02:34:38,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584710179] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:38,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:38,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:34:38,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10216791] [2021-10-16 02:34:38,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:34:38,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:34:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:34:38,575 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 02:34:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:38,604 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-10-16 02:34:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:34:38,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-16 02:34:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:38,605 INFO L225 Difference]: With dead ends: 61 [2021-10-16 02:34:38,605 INFO L226 Difference]: Without dead ends: 59 [2021-10-16 02:34:38,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-16 02:34:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-16 02:34:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 58 states have internal predecessors, (66), 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 02:34:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-10-16 02:34:38,611 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 15 [2021-10-16 02:34:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:38,611 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-10-16 02:34:38,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 02:34:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-10-16 02:34:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:34:38,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:38,612 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:38,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-16 02:34:38,612 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:38,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash 996486959, now seen corresponding path program 1 times [2021-10-16 02:34:38,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:38,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788029148] [2021-10-16 02:34:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:38,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:38,654 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 02:34:38,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:38,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788029148] [2021-10-16 02:34:38,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788029148] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:38,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:38,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:34:38,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763153803] [2021-10-16 02:34:38,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:34:38,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:34:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:34:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:34:38,658 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 02:34:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:38,696 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-10-16 02:34:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:34:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:34:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:38,697 INFO L225 Difference]: With dead ends: 59 [2021-10-16 02:34:38,697 INFO L226 Difference]: Without dead ends: 55 [2021-10-16 02:34:38,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:34:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-16 02:34:38,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-16 02:34:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.24) internal successors, (62), 54 states have internal predecessors, (62), 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 02:34:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-16 02:34:38,702 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 16 [2021-10-16 02:34:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:38,702 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-16 02:34:38,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 02:34:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-16 02:34:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:34:38,703 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:38,703 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:38,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-16 02:34:38,703 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash 321012073, now seen corresponding path program 1 times [2021-10-16 02:34:38,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:34:38,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434486241] [2021-10-16 02:34:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:38,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:34:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:34:38,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:34:38,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434486241] [2021-10-16 02:34:38,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434486241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:34:38,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417471843] [2021-10-16 02:34:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:38,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:34:38,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:34:38,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:34:38,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:34:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:38,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:34:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:39,319 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 02:34:39,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:34:39,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417471843] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:34:39,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [338436710] [2021-10-16 02:34:39,476 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-16 02:34:39,476 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:34:39,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:34:39,498 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:34:39,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:34:39,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:34:39,550 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:34:39,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:34:39,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:34:39,555 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:34:39,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:34:39,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:34:39,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-16 02:34:39,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:34:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:34:39,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:34:39,619 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 02:34:39,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:34:39,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:34:39,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:34:39,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:34:39,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:34:39,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:34:39,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:34:39,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:34:39,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-16 02:34:39,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:34:39,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:136, output treesize:139 [2021-10-16 02:34:39,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:39,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:34:39,863 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_10| 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 02:34:39,866 INFO L168 Benchmark]: Toolchain (without parser) took 6520.05 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 55.3 MB in the beginning and 42.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 45.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:39,866 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 71.6 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:34:39,867 INFO L168 Benchmark]: CACSL2BoogieTranslator took 424.52 ms. Allocated memory is still 96.5 MB. Free memory was 55.2 MB in the beginning and 67.0 MB in the end (delta: -11.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:39,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.02 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 65.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:39,867 INFO L168 Benchmark]: Boogie Preprocessor took 51.51 ms. Allocated memory is still 96.5 MB. Free memory was 65.0 MB in the beginning and 63.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:34:39,868 INFO L168 Benchmark]: RCFGBuilder took 562.29 ms. Allocated memory is still 96.5 MB. Free memory was 63.6 MB in the beginning and 47.8 MB in the end (delta: 15.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:39,868 INFO L168 Benchmark]: TraceAbstraction took 5409.14 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 47.4 MB in the beginning and 42.7 MB in the end (delta: 4.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:39,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 71.6 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 424.52 ms. Allocated memory is still 96.5 MB. Free memory was 55.2 MB in the beginning and 67.0 MB in the end (delta: -11.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.02 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 65.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.51 ms. Allocated memory is still 96.5 MB. Free memory was 65.0 MB in the beginning and 63.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 562.29 ms. Allocated memory is still 96.5 MB. Free memory was 63.6 MB in the beginning and 47.8 MB in the end (delta: 15.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5409.14 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 47.4 MB in the beginning and 42.7 MB in the end (delta: 4.8 MB). Peak memory consumption was 39.8 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_10| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_10|: 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 02:34:39,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:34:42,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:34:42,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:34:42,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:34:42,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:34:42,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:34:42,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:34:42,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:34:42,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:34:42,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:34:42,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:34:42,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:34:42,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:34:42,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:34:42,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:34:42,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:34:42,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:34:42,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:34:42,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:34:42,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:34:42,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:34:42,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:34:42,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:34:42,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:34:42,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:34:42,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:34:42,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:34:42,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:34:42,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:34:42,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:34:42,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:34:42,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:34:42,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:34:42,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:34:42,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:34:42,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:34:42,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:34:42,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:34:42,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:34:42,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:34:42,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:34:42,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:34:42,747 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:34:42,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:34:42,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:34:42,749 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:34:42,749 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:34:42,749 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:34:42,749 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:34:42,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:34:42,750 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:34:42,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:34:42,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:34:42,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:34:42,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:34:42,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:34:42,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:34:42,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:34:42,753 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:34:42,753 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:34:42,753 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:34:42,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:34:42,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:34:42,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:34:42,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:34:42,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:34:42,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:34:42,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:34:42,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:34:42,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:34:42,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:34:42,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:34:42,756 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:34:42,756 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:34:42,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:34:42,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:34:42,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:34:42,757 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_b73fee52-e1fb-4703-bd53-621944f66777/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b57e964dbb610d8a39ef60225ec1dbb75ce4568 [2021-10-16 02:34:43,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:34:43,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:34:43,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:34:43,256 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:34:43,257 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:34:43,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2021-10-16 02:34:43,338 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data/0caeee09e/660eb1cf018e47f8a825e12ffa4be6c0/FLAGec2567abf [2021-10-16 02:34:43,827 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:34:43,827 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2021-10-16 02:34:43,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data/0caeee09e/660eb1cf018e47f8a825e12ffa4be6c0/FLAGec2567abf [2021-10-16 02:34:44,212 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/data/0caeee09e/660eb1cf018e47f8a825e12ffa4be6c0 [2021-10-16 02:34:44,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:34:44,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:34:44,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:34:44,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:34:44,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:34:44,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@624d535e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44, skipping insertion in model container [2021-10-16 02:34:44,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:34:44,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:34:44,550 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1224,1237] [2021-10-16 02:34:44,562 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1636,1649] [2021-10-16 02:34:44,574 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1851,1864] [2021-10-16 02:34:44,577 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2384,2397] [2021-10-16 02:34:44,579 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2599,2612] [2021-10-16 02:34:44,582 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2901,2914] [2021-10-16 02:34:44,584 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3116,3129] [2021-10-16 02:34:44,586 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3386,3399] [2021-10-16 02:34:44,588 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3604,3617] [2021-10-16 02:34:44,591 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4088,4101] [2021-10-16 02:34:44,593 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4306,4319] [2021-10-16 02:34:44,600 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4802,4815] [2021-10-16 02:34:44,607 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5203,5216] [2021-10-16 02:34:44,619 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5421,5434] [2021-10-16 02:34:44,621 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5792,5805] [2021-10-16 02:34:44,623 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6010,6023] [2021-10-16 02:34:44,625 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6296,6309] [2021-10-16 02:34:44,626 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6514,6527] [2021-10-16 02:34:44,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:34:44,647 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:34:44,688 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1224,1237] [2021-10-16 02:34:44,709 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1636,1649] [2021-10-16 02:34:44,711 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[1851,1864] [2021-10-16 02:34:44,713 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2384,2397] [2021-10-16 02:34:44,715 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2599,2612] [2021-10-16 02:34:44,717 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[2901,2914] [2021-10-16 02:34:44,718 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3116,3129] [2021-10-16 02:34:44,720 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3386,3399] [2021-10-16 02:34:44,721 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[3604,3617] [2021-10-16 02:34:44,740 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4088,4101] [2021-10-16 02:34:44,742 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4306,4319] [2021-10-16 02:34:44,744 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[4802,4815] [2021-10-16 02:34:44,746 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5203,5216] [2021-10-16 02:34:44,751 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5421,5434] [2021-10-16 02:34:44,753 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[5792,5805] [2021-10-16 02:34:44,755 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6010,6023] [2021-10-16 02:34:44,757 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6296,6309] [2021-10-16 02:34:44,758 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_b73fee52-e1fb-4703-bd53-621944f66777/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c[6514,6527] [2021-10-16 02:34:44,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:34:44,775 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:34:44,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44 WrapperNode [2021-10-16 02:34:44,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:34:44,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:34:44,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:34:44,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:34:44,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:34:44,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:34:44,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:34:44,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:34:44,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:34:44,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:34:44,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:34:44,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:34:44,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (1/1) ... [2021-10-16 02:34:44,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:34:44,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:34:44,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:34:44,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:34:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:34:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:34:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:34:44,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:34:45,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:34:45,557 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-16 02:34:45,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:34:45 BoogieIcfgContainer [2021-10-16 02:34:45,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:34:45,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:34:45,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:34:45,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:34:45,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:34:44" (1/3) ... [2021-10-16 02:34:45,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a09281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:34:45, skipping insertion in model container [2021-10-16 02:34:45,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:34:44" (2/3) ... [2021-10-16 02:34:45,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a09281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:34:45, skipping insertion in model container [2021-10-16 02:34:45,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:34:45" (3/3) ... [2021-10-16 02:34:45,580 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+lhb-reducer.c [2021-10-16 02:34:45,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:34:45,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-16 02:34:45,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:34:45,669 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 02:34:45,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-10-16 02:34:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 56 states have (on average 1.8571428571428572) internal successors, (104), 74 states have internal predecessors, (104), 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 02:34:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:34:45,695 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:45,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:45,697 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:45,706 INFO L82 PathProgramCache]: Analyzing trace with hash 123910062, now seen corresponding path program 1 times [2021-10-16 02:34:45,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:45,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495111212] [2021-10-16 02:34:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:45,744 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:45,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:45,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:45,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:34:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:45,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:34:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:46,131 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 02:34:46,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:46,222 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 02:34:46,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:46,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495111212] [2021-10-16 02:34:46,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495111212] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:46,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:46,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:34:46,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787363698] [2021-10-16 02:34:46,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:34:46,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:46,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:34:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:46,249 INFO L87 Difference]: Start difference. First operand has 75 states, 56 states have (on average 1.8571428571428572) internal successors, (104), 74 states have internal predecessors, (104), 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 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:46,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:46,530 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2021-10-16 02:34:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:34:46,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:34:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:46,541 INFO L225 Difference]: With dead ends: 131 [2021-10-16 02:34:46,543 INFO L226 Difference]: Without dead ends: 107 [2021-10-16 02:34:46,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-16 02:34:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 69. [2021-10-16 02:34:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 68 states have internal predecessors, (73), 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 02:34:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-10-16 02:34:46,606 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 8 [2021-10-16 02:34:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:46,607 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-10-16 02:34:46,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-10-16 02:34:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:34:46,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:46,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:46,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 02:34:46,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:46,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:46,823 INFO L82 PathProgramCache]: Analyzing trace with hash 120339118, now seen corresponding path program 1 times [2021-10-16 02:34:46,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:46,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079231144] [2021-10-16 02:34:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:46,824 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:46,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:46,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:46,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:34:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:46,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:34:46,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:47,088 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 02:34:47,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:47,158 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 02:34:47,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:47,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079231144] [2021-10-16 02:34:47,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079231144] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:47,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:47,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:34:47,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528585294] [2021-10-16 02:34:47,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:34:47,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:34:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:34:47,164 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:47,345 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2021-10-16 02:34:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:34:47,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:34:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:47,348 INFO L225 Difference]: With dead ends: 107 [2021-10-16 02:34:47,348 INFO L226 Difference]: Without dead ends: 105 [2021-10-16 02:34:47,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-16 02:34:47,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-10-16 02:34:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.392156862745098) internal successors, (71), 66 states have internal predecessors, (71), 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 02:34:47,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-10-16 02:34:47,370 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 8 [2021-10-16 02:34:47,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:47,370 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-10-16 02:34:47,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-10-16 02:34:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:34:47,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:47,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:47,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:47,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:47,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:47,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:47,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2031737892, now seen corresponding path program 1 times [2021-10-16 02:34:47,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:47,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874857998] [2021-10-16 02:34:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:47,595 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:47,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:47,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:47,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:34:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:47,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:34:47,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:47,735 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 02:34:47,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:47,811 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 02:34:47,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:47,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874857998] [2021-10-16 02:34:47,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874857998] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:47,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:47,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:34:47,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569834153] [2021-10-16 02:34:47,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:34:47,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:47,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:34:47,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:47,815 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 02:34:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:48,210 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2021-10-16 02:34:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:34:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 02:34:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:48,215 INFO L225 Difference]: With dead ends: 232 [2021-10-16 02:34:48,215 INFO L226 Difference]: Without dead ends: 230 [2021-10-16 02:34:48,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:34:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-16 02:34:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 80. [2021-10-16 02:34:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.453125) internal successors, (93), 79 states have internal predecessors, (93), 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 02:34:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2021-10-16 02:34:48,229 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 11 [2021-10-16 02:34:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:48,230 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2021-10-16 02:34:48,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 02:34:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2021-10-16 02:34:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:34:48,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:48,231 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:48,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:48,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:48,445 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:48,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1271153903, now seen corresponding path program 1 times [2021-10-16 02:34:48,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:48,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711340381] [2021-10-16 02:34:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:48,448 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:48,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:48,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:48,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:34:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:48,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:34:48,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:48,606 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 02:34:48,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:48,679 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 02:34:48,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:48,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711340381] [2021-10-16 02:34:48,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711340381] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:48,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:48,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:34:48,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769216999] [2021-10-16 02:34:48,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:34:48,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:48,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:34:48,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:48,683 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 02:34:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:49,018 INFO L93 Difference]: Finished difference Result 226 states and 241 transitions. [2021-10-16 02:34:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:34:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 02:34:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:49,021 INFO L225 Difference]: With dead ends: 226 [2021-10-16 02:34:49,022 INFO L226 Difference]: Without dead ends: 224 [2021-10-16 02:34:49,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:34:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-16 02:34:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 106. [2021-10-16 02:34:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 90 states have (on average 1.5444444444444445) internal successors, (139), 105 states have internal predecessors, (139), 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 02:34:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-10-16 02:34:49,036 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 11 [2021-10-16 02:34:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:49,036 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-10-16 02:34:49,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 02:34:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-10-16 02:34:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:34:49,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:49,038 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:49,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:49,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:49,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:49,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1440630601, now seen corresponding path program 1 times [2021-10-16 02:34:49,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:49,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295431683] [2021-10-16 02:34:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:49,256 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:49,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:49,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:49,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:34:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:34:49,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:34:49,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:49,563 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 02:34:49,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:49,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295431683] [2021-10-16 02:34:49,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295431683] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:49,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:49,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-16 02:34:49,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335240879] [2021-10-16 02:34:49,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:34:49,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:34:49,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:49,566 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:49,820 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-10-16 02:34:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:34:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:34:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:49,822 INFO L225 Difference]: With dead ends: 134 [2021-10-16 02:34:49,822 INFO L226 Difference]: Without dead ends: 128 [2021-10-16 02:34:49,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:34:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-16 02:34:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-10-16 02:34:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 101 states have internal predecessors, (132), 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 02:34:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2021-10-16 02:34:49,833 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 12 [2021-10-16 02:34:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:49,834 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2021-10-16 02:34:49,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2021-10-16 02:34:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:34:49,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:49,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:49,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:50,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:50,052 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1440142029, now seen corresponding path program 1 times [2021-10-16 02:34:50,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:50,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3984099] [2021-10-16 02:34:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:50,054 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:50,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:50,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:50,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:34:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:50,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:34:50,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:50,240 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 02:34:50,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:50,322 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 02:34:50,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:50,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3984099] [2021-10-16 02:34:50,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3984099] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:50,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:50,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:34:50,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941021984] [2021-10-16 02:34:50,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:34:50,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:34:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:50,325 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:50,673 INFO L93 Difference]: Finished difference Result 338 states and 361 transitions. [2021-10-16 02:34:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:34:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:34:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:50,676 INFO L225 Difference]: With dead ends: 338 [2021-10-16 02:34:50,677 INFO L226 Difference]: Without dead ends: 336 [2021-10-16 02:34:50,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:34:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-10-16 02:34:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 104. [2021-10-16 02:34:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.4943820224719102) internal successors, (133), 103 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 02:34:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-10-16 02:34:50,688 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 12 [2021-10-16 02:34:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:50,689 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-10-16 02:34:50,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-10-16 02:34:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:34:50,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:50,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:50,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:50,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:50,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:50,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1440126141, now seen corresponding path program 1 times [2021-10-16 02:34:50,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:50,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542593730] [2021-10-16 02:34:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:50,905 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:50,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:50,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:50,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:34:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:51,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:34:51,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:51,086 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 02:34:51,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:51,157 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 02:34:51,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:51,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542593730] [2021-10-16 02:34:51,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542593730] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:51,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:51,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:34:51,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406209032] [2021-10-16 02:34:51,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:34:51,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:51,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:34:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:51,160 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:51,525 INFO L93 Difference]: Finished difference Result 310 states and 332 transitions. [2021-10-16 02:34:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:34:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:34:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:51,536 INFO L225 Difference]: With dead ends: 310 [2021-10-16 02:34:51,536 INFO L226 Difference]: Without dead ends: 308 [2021-10-16 02:34:51,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:34:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-16 02:34:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 105. [2021-10-16 02:34:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 104 states have internal predecessors, (132), 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 02:34:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2021-10-16 02:34:51,547 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 12 [2021-10-16 02:34:51,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:51,548 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2021-10-16 02:34:51,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2021-10-16 02:34:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:34:51,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:51,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:51,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:51,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:51,764 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:51,764 INFO L82 PathProgramCache]: Analyzing trace with hash -751061257, now seen corresponding path program 1 times [2021-10-16 02:34:51,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:51,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145134454] [2021-10-16 02:34:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:51,765 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:51,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:51,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:51,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:34:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:51,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:34:51,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:52,036 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 02:34:52,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:52,100 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 02:34:52,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:52,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145134454] [2021-10-16 02:34:52,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145134454] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:52,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:52,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-16 02:34:52,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23825188] [2021-10-16 02:34:52,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:34:52,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:52,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:34:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:52,102 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:52,293 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2021-10-16 02:34:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:34:52,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:34:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:52,294 INFO L225 Difference]: With dead ends: 125 [2021-10-16 02:34:52,294 INFO L226 Difference]: Without dead ends: 119 [2021-10-16 02:34:52,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:34:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-16 02:34:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-10-16 02:34:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 87 states have (on average 1.4367816091954022) internal successors, (125), 100 states have internal predecessors, (125), 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 02:34:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2021-10-16 02:34:52,301 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 12 [2021-10-16 02:34:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:52,302 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2021-10-16 02:34:52,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2021-10-16 02:34:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:34:52,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:52,303 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:52,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:52,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:52,516 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:52,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1694725733, now seen corresponding path program 1 times [2021-10-16 02:34:52,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:52,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513261583] [2021-10-16 02:34:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:52,517 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:52,518 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:52,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:34:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:52,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:34:52,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:52,835 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 02:34:52,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:53,018 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 02:34:53,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:53,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513261583] [2021-10-16 02:34:53,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513261583] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:53,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:53,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-16 02:34:53,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744160654] [2021-10-16 02:34:53,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:34:53,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:53,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:34:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:34:53,022 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:53,820 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2021-10-16 02:34:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:34:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:34:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:53,822 INFO L225 Difference]: With dead ends: 158 [2021-10-16 02:34:53,822 INFO L226 Difference]: Without dead ends: 156 [2021-10-16 02:34:53,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:34:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-16 02:34:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 99. [2021-10-16 02:34:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 86 states have (on average 1.4069767441860466) internal successors, (121), 98 states have internal predecessors, (121), 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 02:34:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2021-10-16 02:34:53,834 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 13 [2021-10-16 02:34:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:53,835 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2021-10-16 02:34:53,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2021-10-16 02:34:53,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:34:53,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:53,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:53,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:54,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:54,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1694233189, now seen corresponding path program 1 times [2021-10-16 02:34:54,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:54,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135414583] [2021-10-16 02:34:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:54,049 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:54,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:54,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:54,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:34:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:54,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:34:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:54,371 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 02:34:54,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:54,554 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 02:34:54,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:54,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135414583] [2021-10-16 02:34:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135414583] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:54,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:54,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-16 02:34:54,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823059075] [2021-10-16 02:34:54,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:34:54,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:34:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:34:54,557 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:55,179 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2021-10-16 02:34:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:34:55,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:34:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:55,182 INFO L225 Difference]: With dead ends: 147 [2021-10-16 02:34:55,182 INFO L226 Difference]: Without dead ends: 145 [2021-10-16 02:34:55,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:34:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-16 02:34:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 97. [2021-10-16 02:34:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.3764705882352941) 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 02:34:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2021-10-16 02:34:55,193 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 13 [2021-10-16 02:34:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:55,193 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2021-10-16 02:34:55,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2021-10-16 02:34:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:34:55,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:55,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:55,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:55,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:55,412 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:55,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1791008026, now seen corresponding path program 1 times [2021-10-16 02:34:55,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:55,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888380517] [2021-10-16 02:34:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:55,413 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:55,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:55,414 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:55,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:34:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:55,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:34:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:55,645 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 02:34:55,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:55,728 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 02:34:55,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:55,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888380517] [2021-10-16 02:34:55,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888380517] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:55,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:55,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:34:55,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952253707] [2021-10-16 02:34:55,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:34:55,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:55,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:34:55,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:55,731 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:56,049 INFO L93 Difference]: Finished difference Result 233 states and 254 transitions. [2021-10-16 02:34:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:34:56,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:34:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:56,052 INFO L225 Difference]: With dead ends: 233 [2021-10-16 02:34:56,052 INFO L226 Difference]: Without dead ends: 231 [2021-10-16 02:34:56,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:34:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-10-16 02:34:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 100. [2021-10-16 02:34:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.375) internal successors, (121), 99 states have internal predecessors, (121), 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 02:34:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-10-16 02:34:56,061 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 13 [2021-10-16 02:34:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:56,061 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-10-16 02:34:56,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-10-16 02:34:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:34:56,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:56,062 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:56,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:56,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:56,263 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:56,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1789284122, now seen corresponding path program 1 times [2021-10-16 02:34:56,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:56,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645256955] [2021-10-16 02:34:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:56,264 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:56,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:56,265 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:56,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:34:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:56,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:34:56,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:34:56,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:56,550 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 02:34:56,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:56,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645256955] [2021-10-16 02:34:56,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645256955] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:56,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:56,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:34:56,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171858438] [2021-10-16 02:34:56,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:34:56,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:56,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:34:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:56,552 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:56,792 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2021-10-16 02:34:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:34:56,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:34:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:56,794 INFO L225 Difference]: With dead ends: 156 [2021-10-16 02:34:56,794 INFO L226 Difference]: Without dead ends: 154 [2021-10-16 02:34:56,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:34:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-16 02:34:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 102. [2021-10-16 02:34:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.3777777777777778) internal successors, (124), 101 states have internal predecessors, (124), 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 02:34:56,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2021-10-16 02:34:56,801 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 13 [2021-10-16 02:34:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:56,802 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2021-10-16 02:34:56,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2021-10-16 02:34:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:34:56,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:56,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:56,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-16 02:34:57,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:57,014 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash 313330138, now seen corresponding path program 1 times [2021-10-16 02:34:57,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:57,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316043155] [2021-10-16 02:34:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:57,016 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:57,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:57,018 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:57,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:34:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:34:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:57,435 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 02:34:57,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:57,644 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 02:34:57,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:57,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316043155] [2021-10-16 02:34:57,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316043155] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:57,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:57,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-16 02:34:57,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533242227] [2021-10-16 02:34:57,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:34:57,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:34:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:34:57,648 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:58,174 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2021-10-16 02:34:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:34:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 02:34:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:58,176 INFO L225 Difference]: With dead ends: 142 [2021-10-16 02:34:58,176 INFO L226 Difference]: Without dead ends: 140 [2021-10-16 02:34:58,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:34:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-16 02:34:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 100. [2021-10-16 02:34:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.3595505617977528) internal successors, (121), 99 states have internal predecessors, (121), 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 02:34:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-10-16 02:34:58,184 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 14 [2021-10-16 02:34:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:58,185 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-10-16 02:34:58,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-10-16 02:34:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:34:58,186 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:58,186 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:58,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:58,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:58,400 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:58,400 INFO L82 PathProgramCache]: Analyzing trace with hash 314877283, now seen corresponding path program 1 times [2021-10-16 02:34:58,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:58,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829309440] [2021-10-16 02:34:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:58,401 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:58,402 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:58,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:34:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:58,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:34:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:58,585 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 02:34:58,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:58,660 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 02:34:58,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:58,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829309440] [2021-10-16 02:34:58,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829309440] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:58,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:58,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:34:58,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808766894] [2021-10-16 02:34:58,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:34:58,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:58,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:34:58,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:34:58,662 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:34:58,949 INFO L93 Difference]: Finished difference Result 221 states and 244 transitions. [2021-10-16 02:34:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:34:58,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 02:34:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:34:58,951 INFO L225 Difference]: With dead ends: 221 [2021-10-16 02:34:58,951 INFO L226 Difference]: Without dead ends: 219 [2021-10-16 02:34:58,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:34:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-10-16 02:34:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 105. [2021-10-16 02:34:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 94 states have (on average 1.3297872340425532) internal successors, (125), 104 states have internal predecessors, (125), 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 02:34:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2021-10-16 02:34:58,960 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 14 [2021-10-16 02:34:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:34:58,960 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2021-10-16 02:34:58,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:34:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2021-10-16 02:34:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:34:58,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:34:58,961 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:34:58,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:34:59,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:34:59,173 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:34:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:34:59,173 INFO L82 PathProgramCache]: Analyzing trace with hash 366771218, now seen corresponding path program 1 times [2021-10-16 02:34:59,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:34:59,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69841044] [2021-10-16 02:34:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:59,174 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:34:59,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:34:59,175 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:34:59,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:34:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:34:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:59,544 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 02:34:59,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:34:59,691 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 02:34:59,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:59,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69841044] [2021-10-16 02:34:59,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69841044] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:34:59,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:59,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-16 02:34:59,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019902547] [2021-10-16 02:34:59,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:34:59,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:34:59,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:34:59,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:34:59,694 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:00,266 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2021-10-16 02:35:00,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:35:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 02:35:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:00,267 INFO L225 Difference]: With dead ends: 109 [2021-10-16 02:35:00,267 INFO L226 Difference]: Without dead ends: 103 [2021-10-16 02:35:00,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:35:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-16 02:35:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-10-16 02:35:00,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 100 states have internal predecessors, (118), 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 02:35:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2021-10-16 02:35:00,275 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 14 [2021-10-16 02:35:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:00,276 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2021-10-16 02:35:00,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2021-10-16 02:35:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:35:00,277 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:00,277 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:00,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:00,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:35:00,487 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:00,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:00,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1171265312, now seen corresponding path program 1 times [2021-10-16 02:35:00,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:00,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485747378] [2021-10-16 02:35:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:00,488 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:00,492 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:00,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:35:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:00,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:00,896 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 02:35:00,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:01,082 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 02:35:01,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:01,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485747378] [2021-10-16 02:35:01,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485747378] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:01,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:01,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-16 02:35:01,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272776316] [2021-10-16 02:35:01,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:35:01,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:35:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:35:01,085 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 02:35:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:01,502 INFO L93 Difference]: Finished difference Result 142 states and 166 transitions. [2021-10-16 02:35:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:35:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) Word has length 15 [2021-10-16 02:35:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:01,504 INFO L225 Difference]: With dead ends: 142 [2021-10-16 02:35:01,505 INFO L226 Difference]: Without dead ends: 140 [2021-10-16 02:35:01,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:35:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-16 02:35:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2021-10-16 02:35:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 98 states have internal predecessors, (114), 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 02:35:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2021-10-16 02:35:01,514 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 15 [2021-10-16 02:35:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:01,514 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2021-10-16 02:35:01,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 02:35:01,515 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2021-10-16 02:35:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:35:01,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:01,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:01,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:01,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:35:01,729 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:01,730 INFO L82 PathProgramCache]: Analyzing trace with hash 462679229, now seen corresponding path program 1 times [2021-10-16 02:35:01,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:01,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308075987] [2021-10-16 02:35:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:01,730 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:01,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:01,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:01,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:35:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:01,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:35:01,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:02,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:02,216 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 02:35:02,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:02,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308075987] [2021-10-16 02:35:02,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308075987] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:02,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:02,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-16 02:35:02,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459096418] [2021-10-16 02:35:02,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:35:02,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:35:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:35:02,219 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:02,678 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2021-10-16 02:35:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:35:02,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:35:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:02,681 INFO L225 Difference]: With dead ends: 193 [2021-10-16 02:35:02,681 INFO L226 Difference]: Without dead ends: 191 [2021-10-16 02:35:02,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:35:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-16 02:35:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 109. [2021-10-16 02:35:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 100 states have (on average 1.29) internal successors, (129), 108 states have internal predecessors, (129), 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 02:35:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2021-10-16 02:35:02,697 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 16 [2021-10-16 02:35:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:02,697 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2021-10-16 02:35:02,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2021-10-16 02:35:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:35:02,698 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:02,699 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:02,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:02,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:35:02,912 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1458158324, now seen corresponding path program 1 times [2021-10-16 02:35:02,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:02,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810735209] [2021-10-16 02:35:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:02,913 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:02,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:02,913 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:02,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:35:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:35:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:03,284 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 02:35:03,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:03,354 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 02:35:03,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:03,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810735209] [2021-10-16 02:35:03,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810735209] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:03,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:03,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 4] imperfect sequences [] total 9 [2021-10-16 02:35:03,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834605947] [2021-10-16 02:35:03,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:35:03,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:03,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:35:03,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:35:03,356 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:03,597 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2021-10-16 02:35:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:35:03,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 02:35:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:03,599 INFO L225 Difference]: With dead ends: 111 [2021-10-16 02:35:03,599 INFO L226 Difference]: Without dead ends: 105 [2021-10-16 02:35:03,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:35:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-16 02:35:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-10-16 02:35:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 104 states have internal predecessors, (122), 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 02:35:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2021-10-16 02:35:03,607 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 17 [2021-10-16 02:35:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:03,608 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2021-10-16 02:35:03,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2021-10-16 02:35:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:35:03,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:03,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:03,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:03,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:35:03,810 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash 666878526, now seen corresponding path program 1 times [2021-10-16 02:35:03,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:03,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728975705] [2021-10-16 02:35:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:03,811 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:03,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:03,812 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:03,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 02:35:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:04,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:04,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:04,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728975705] [2021-10-16 02:35:04,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728975705] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:04,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1971146433] [2021-10-16 02:35:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:04,425 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:04,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:04,432 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:04,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-16 02:35:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:04,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:04,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:04,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:05,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1971146433] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:05,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328413511] [2021-10-16 02:35:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:05,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:05,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:05,114 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:05,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-16 02:35:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:05,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:35:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:05,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:06,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328413511] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:06,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:35:06,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 27 [2021-10-16 02:35:06,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779145592] [2021-10-16 02:35:06,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-16 02:35:06,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-16 02:35:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-10-16 02:35:06,225 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 27 states have internal predecessors, (89), 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 02:35:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:07,982 INFO L93 Difference]: Finished difference Result 314 states and 350 transitions. [2021-10-16 02:35:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 02:35:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 27 states have internal predecessors, (89), 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 02:35:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:07,984 INFO L225 Difference]: With dead ends: 314 [2021-10-16 02:35:07,985 INFO L226 Difference]: Without dead ends: 306 [2021-10-16 02:35:07,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1315.6ms TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2021-10-16 02:35:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-16 02:35:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 188. [2021-10-16 02:35:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 180 states have (on average 1.3722222222222222) internal successors, (247), 187 states have internal predecessors, (247), 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 02:35:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 247 transitions. [2021-10-16 02:35:08,002 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 247 transitions. Word has length 25 [2021-10-16 02:35:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:08,003 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 247 transitions. [2021-10-16 02:35:08,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 27 states have internal predecessors, (89), 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 02:35:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 247 transitions. [2021-10-16 02:35:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:35:08,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:08,004 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:08,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:08,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:08,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-16 02:35:08,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:35:08,619 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:08,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1464651411, now seen corresponding path program 1 times [2021-10-16 02:35:08,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:08,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876571069] [2021-10-16 02:35:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:08,620 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:08,621 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:08,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-16 02:35:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:08,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:08,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:09,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:09,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876571069] [2021-10-16 02:35:09,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876571069] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:09,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [689372852] [2021-10-16 02:35:09,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:09,207 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:09,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:09,211 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:09,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-16 02:35:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:09,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:09,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:09,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:09,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [689372852] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:09,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16255613] [2021-10-16 02:35:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:09,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:09,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:09,951 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:09,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-16 02:35:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:10,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:35:10,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:10,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:11,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16255613] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:11,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:35:11,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 27 [2021-10-16 02:35:11,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074452286] [2021-10-16 02:35:11,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-16 02:35:11,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-16 02:35:11,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-10-16 02:35:11,008 INFO L87 Difference]: Start difference. First operand 188 states and 247 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 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 02:35:12,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:12,782 INFO L93 Difference]: Finished difference Result 296 states and 332 transitions. [2021-10-16 02:35:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-16 02:35:12,783 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-16 02:35:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:12,785 INFO L225 Difference]: With dead ends: 296 [2021-10-16 02:35:12,785 INFO L226 Difference]: Without dead ends: 288 [2021-10-16 02:35:12,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1267.0ms TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2021-10-16 02:35:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-10-16 02:35:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 192. [2021-10-16 02:35:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 184 states have (on average 1.3423913043478262) internal successors, (247), 191 states have internal predecessors, (247), 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 02:35:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 247 transitions. [2021-10-16 02:35:12,802 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 247 transitions. Word has length 26 [2021-10-16 02:35:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:12,803 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 247 transitions. [2021-10-16 02:35:12,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 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 02:35:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 247 transitions. [2021-10-16 02:35:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:35:12,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:12,804 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:12,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:13,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:13,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:13,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:13,407 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:13,408 INFO L82 PathProgramCache]: Analyzing trace with hash -675947159, now seen corresponding path program 1 times [2021-10-16 02:35:13,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:13,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024205193] [2021-10-16 02:35:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:13,409 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:13,410 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:13,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-16 02:35:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:13,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:13,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:13,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:14,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:14,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024205193] [2021-10-16 02:35:14,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024205193] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:14,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1113872888] [2021-10-16 02:35:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:14,046 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:14,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:14,048 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:14,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-16 02:35:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:14,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:14,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:14,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1113872888] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:14,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193066555] [2021-10-16 02:35:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:14,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:14,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:14,779 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:14,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-16 02:35:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:15,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:35:15,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:15,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:35:15,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193066555] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:35:15,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:35:15,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-16 02:35:15,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324051312] [2021-10-16 02:35:15,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:35:15,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:35:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:35:15,933 INFO L87 Difference]: Start difference. First operand 192 states and 247 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:16,476 INFO L93 Difference]: Finished difference Result 298 states and 386 transitions. [2021-10-16 02:35:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:35:16,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-16 02:35:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:16,479 INFO L225 Difference]: With dead ends: 298 [2021-10-16 02:35:16,479 INFO L226 Difference]: Without dead ends: 296 [2021-10-16 02:35:16,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 784.8ms TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 02:35:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-16 02:35:16,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 204. [2021-10-16 02:35:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.3214285714285714) internal successors, (259), 203 states have internal predecessors, (259), 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 02:35:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 259 transitions. [2021-10-16 02:35:16,500 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 259 transitions. Word has length 26 [2021-10-16 02:35:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:16,501 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 259 transitions. [2021-10-16 02:35:16,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 259 transitions. [2021-10-16 02:35:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:35:16,502 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:16,503 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:16,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:16,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-10-16 02:35:16,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:17,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:17,117 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:17,118 INFO L82 PathProgramCache]: Analyzing trace with hash 937317075, now seen corresponding path program 1 times [2021-10-16 02:35:17,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:17,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168691451] [2021-10-16 02:35:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:17,119 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:17,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:17,120 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:17,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-16 02:35:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:17,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:17,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:17,587 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 02:35:17,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:17,758 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 02:35:17,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:17,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168691451] [2021-10-16 02:35:17,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168691451] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:17,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1873284840] [2021-10-16 02:35:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:17,759 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:17,760 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:17,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-16 02:35:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:18,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:18,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:18,385 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 02:35:18,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:18,505 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 02:35:18,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1873284840] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:18,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102582247] [2021-10-16 02:35:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:18,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:18,511 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:18,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-16 02:35:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:35:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:19,583 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 02:35:19,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:19,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102582247] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:35:19,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:35:19,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-16 02:35:19,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029311341] [2021-10-16 02:35:19,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:35:19,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:35:19,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:35:19,821 INFO L87 Difference]: Start difference. First operand 204 states and 259 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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 02:35:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:20,548 INFO L93 Difference]: Finished difference Result 355 states and 464 transitions. [2021-10-16 02:35:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 02:35:20,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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) Word has length 27 [2021-10-16 02:35:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:20,553 INFO L225 Difference]: With dead ends: 355 [2021-10-16 02:35:20,554 INFO L226 Difference]: Without dead ends: 353 [2021-10-16 02:35:20,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 909.0ms TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2021-10-16 02:35:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-16 02:35:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 228. [2021-10-16 02:35:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 220 states have (on average 1.3454545454545455) internal successors, (296), 227 states have internal predecessors, (296), 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 02:35:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 296 transitions. [2021-10-16 02:35:20,578 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 296 transitions. Word has length 27 [2021-10-16 02:35:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:20,579 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 296 transitions. [2021-10-16 02:35:20,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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 02:35:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 296 transitions. [2021-10-16 02:35:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:35:20,580 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:20,580 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:20,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-16 02:35:20,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-16 02:35:20,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-10-16 02:35:21,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:21,197 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:21,198 INFO L82 PathProgramCache]: Analyzing trace with hash 939040979, now seen corresponding path program 1 times [2021-10-16 02:35:21,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:21,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98092290] [2021-10-16 02:35:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:21,199 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:21,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:21,200 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:21,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-16 02:35:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:21,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:21,799 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 02:35:21,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:21,997 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 02:35:21,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:21,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98092290] [2021-10-16 02:35:21,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98092290] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:21,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1560247498] [2021-10-16 02:35:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:21,998 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:21,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:21,999 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:22,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-16 02:35:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:22,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:22,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:22,696 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 02:35:22,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:22,790 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 02:35:22,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1560247498] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:22,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262696060] [2021-10-16 02:35:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:22,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:22,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:22,792 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:22,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-16 02:35:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:35:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:23,919 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 02:35:23,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:24,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262696060] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:35:24,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:35:24,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 8, 8, 14] total 26 [2021-10-16 02:35:24,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624776432] [2021-10-16 02:35:24,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:35:24,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:35:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:35:24,142 INFO L87 Difference]: Start difference. First operand 228 states and 296 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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 02:35:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:24,587 INFO L93 Difference]: Finished difference Result 283 states and 364 transitions. [2021-10-16 02:35:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:35:24,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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) Word has length 27 [2021-10-16 02:35:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:24,590 INFO L225 Difference]: With dead ends: 283 [2021-10-16 02:35:24,590 INFO L226 Difference]: Without dead ends: 280 [2021-10-16 02:35:24,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-10-16 02:35:24,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-16 02:35:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 234. [2021-10-16 02:35:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 226 states have (on average 1.336283185840708) internal successors, (302), 233 states have internal predecessors, (302), 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 02:35:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2021-10-16 02:35:24,610 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 27 [2021-10-16 02:35:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:24,611 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2021-10-16 02:35:24,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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 02:35:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2021-10-16 02:35:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:35:24,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:24,612 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:24,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:24,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:25,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-10-16 02:35:25,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:25,227 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:25,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1840939274, now seen corresponding path program 1 times [2021-10-16 02:35:25,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:25,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920080222] [2021-10-16 02:35:25,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:25,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:25,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:25,229 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:25,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-16 02:35:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:25,807 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 02:35:25,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:26,012 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 02:35:26,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:26,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920080222] [2021-10-16 02:35:26,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920080222] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:26,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1608752606] [2021-10-16 02:35:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:26,013 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:26,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:26,019 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:26,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-16 02:35:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:26,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:26,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:26,775 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 02:35:26,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:26,866 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 02:35:26,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1608752606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:26,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058793975] [2021-10-16 02:35:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:26,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:26,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:26,868 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:26,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-16 02:35:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:27,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:35:27,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:27,874 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 02:35:27,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:35:28,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058793975] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:28,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:35:28,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 15, 8] total 26 [2021-10-16 02:35:28,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581144191] [2021-10-16 02:35:28,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-16 02:35:28,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:28,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-16 02:35:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:35:28,059 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 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 02:35:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:29,799 INFO L93 Difference]: Finished difference Result 451 states and 519 transitions. [2021-10-16 02:35:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-16 02:35:29,800 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-16 02:35:29,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:29,804 INFO L225 Difference]: With dead ends: 451 [2021-10-16 02:35:29,804 INFO L226 Difference]: Without dead ends: 449 [2021-10-16 02:35:29,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1010.1ms TimeCoverageRelationStatistics Valid=619, Invalid=1543, Unknown=0, NotChecked=0, Total=2162 [2021-10-16 02:35:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-10-16 02:35:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 232. [2021-10-16 02:35:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 225 states have (on average 1.3111111111111111) internal successors, (295), 231 states have internal predecessors, (295), 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 02:35:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2021-10-16 02:35:29,839 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 27 [2021-10-16 02:35:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:29,840 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2021-10-16 02:35:29,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 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 02:35:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2021-10-16 02:35:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:35:29,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:29,841 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:29,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:30,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-10-16 02:35:30,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-10-16 02:35:30,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:30,455 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:30,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1840955162, now seen corresponding path program 1 times [2021-10-16 02:35:30,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:30,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147118199] [2021-10-16 02:35:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:30,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:30,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:30,457 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:30,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-16 02:35:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:30,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:30,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:31,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:31,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:31,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147118199] [2021-10-16 02:35:31,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147118199] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:31,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1063323063] [2021-10-16 02:35:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:31,251 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:31,257 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:31,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-16 02:35:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:31,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:31,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:32,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1063323063] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:32,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415954320] [2021-10-16 02:35:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:32,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:32,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:32,136 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:32,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-16 02:35:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:35:32,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:33,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:35:33,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415954320] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:33,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:35:33,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 15, 8] total 26 [2021-10-16 02:35:33,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387074569] [2021-10-16 02:35:33,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-16 02:35:33,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-16 02:35:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:35:33,375 INFO L87 Difference]: Start difference. First operand 232 states and 295 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 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 02:35:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:35,036 INFO L93 Difference]: Finished difference Result 429 states and 495 transitions. [2021-10-16 02:35:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 02:35:35,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-16 02:35:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:35,039 INFO L225 Difference]: With dead ends: 429 [2021-10-16 02:35:35,039 INFO L226 Difference]: Without dead ends: 427 [2021-10-16 02:35:35,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 955.7ms TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2021-10-16 02:35:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-10-16 02:35:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 230. [2021-10-16 02:35:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.2857142857142858) internal successors, (288), 229 states have internal predecessors, (288), 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 02:35:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 288 transitions. [2021-10-16 02:35:35,073 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 288 transitions. Word has length 27 [2021-10-16 02:35:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:35,073 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 288 transitions. [2021-10-16 02:35:35,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 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 02:35:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 288 transitions. [2021-10-16 02:35:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:35:35,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:35,084 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:35,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:35,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:35,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-10-16 02:35:35,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:35,699 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1006390506, now seen corresponding path program 1 times [2021-10-16 02:35:35,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:35,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837504480] [2021-10-16 02:35:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:35,700 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:35,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:35,702 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:35,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-16 02:35:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:36,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:36,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:36,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:36,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:36,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837504480] [2021-10-16 02:35:36,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837504480] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:36,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1062309808] [2021-10-16 02:35:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:36,465 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:36,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:36,465 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:36,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-10-16 02:35:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:37,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:37,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:37,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:37,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1062309808] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:37,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693440005] [2021-10-16 02:35:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:37,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:37,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:37,475 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:37,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-16 02:35:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:35:38,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:38,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:38,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693440005] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:38,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:35:38,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 14, 7] total 26 [2021-10-16 02:35:38,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857979184] [2021-10-16 02:35:38,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-16 02:35:38,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-16 02:35:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:35:38,743 INFO L87 Difference]: Start difference. First operand 230 states and 288 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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 02:35:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:40,205 INFO L93 Difference]: Finished difference Result 369 states and 423 transitions. [2021-10-16 02:35:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-16 02:35:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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 28 [2021-10-16 02:35:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:40,207 INFO L225 Difference]: With dead ends: 369 [2021-10-16 02:35:40,207 INFO L226 Difference]: Without dead ends: 367 [2021-10-16 02:35:40,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1065.5ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-10-16 02:35:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-16 02:35:40,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 223. [2021-10-16 02:35:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.2857142857142858) internal successors, (279), 222 states have internal predecessors, (279), 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 02:35:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 279 transitions. [2021-10-16 02:35:40,230 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 279 transitions. Word has length 28 [2021-10-16 02:35:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:40,230 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 279 transitions. [2021-10-16 02:35:40,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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 02:35:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 279 transitions. [2021-10-16 02:35:40,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:35:40,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:40,231 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:40,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:40,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:40,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-10-16 02:35:40,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:35:40,836 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:40,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1819841235, now seen corresponding path program 1 times [2021-10-16 02:35:40,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:40,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972509217] [2021-10-16 02:35:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:40,837 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:40,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:40,838 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:40,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-16 02:35:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:41,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:41,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:41,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:41,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:41,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972509217] [2021-10-16 02:35:41,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972509217] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:41,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [244605030] [2021-10-16 02:35:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:41,678 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:41,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:41,679 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:41,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-10-16 02:35:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:42,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:42,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:42,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:42,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [244605030] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:42,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466172595] [2021-10-16 02:35:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:42,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:42,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:42,676 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:42,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-16 02:35:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:35:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:43,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:35:44,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466172595] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:35:44,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:35:44,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8, 8, 15] total 26 [2021-10-16 02:35:44,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799682379] [2021-10-16 02:35:44,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:35:44,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:35:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:35:44,006 INFO L87 Difference]: Start difference. First operand 223 states and 279 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:44,434 INFO L93 Difference]: Finished difference Result 323 states and 396 transitions. [2021-10-16 02:35:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:35:44,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-16 02:35:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:44,436 INFO L225 Difference]: With dead ends: 323 [2021-10-16 02:35:44,436 INFO L226 Difference]: Without dead ends: 321 [2021-10-16 02:35:44,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 633.7ms TimeCoverageRelationStatistics Valid=301, Invalid=755, Unknown=0, NotChecked=0, Total=1056 [2021-10-16 02:35:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-10-16 02:35:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 210. [2021-10-16 02:35:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.248780487804878) internal successors, (256), 209 states have internal predecessors, (256), 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 02:35:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 256 transitions. [2021-10-16 02:35:44,456 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 256 transitions. Word has length 28 [2021-10-16 02:35:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:44,456 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 256 transitions. [2021-10-16 02:35:44,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 256 transitions. [2021-10-16 02:35:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:35:44,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:44,458 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:44,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:44,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-16 02:35:44,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-16 02:35:45,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:35:45,062 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:45,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:45,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1821565139, now seen corresponding path program 1 times [2021-10-16 02:35:45,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:45,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973704806] [2021-10-16 02:35:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:45,063 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:45,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:45,064 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:45,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-16 02:35:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:45,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:45,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:45,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:45,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:45,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973704806] [2021-10-16 02:35:45,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973704806] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:45,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1110199321] [2021-10-16 02:35:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:45,935 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:45,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:45,937 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:45,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-10-16 02:35:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:46,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:35:46,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:46,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:47,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1110199321] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:47,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281135710] [2021-10-16 02:35:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:47,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:47,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:47,040 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:47,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-16 02:35:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:35:47,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:48,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:35:48,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281135710] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:35:48,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:35:48,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8, 8, 15] total 26 [2021-10-16 02:35:48,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553379342] [2021-10-16 02:35:48,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:35:48,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:48,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:35:48,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:35:48,466 INFO L87 Difference]: Start difference. First operand 210 states and 256 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:48,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:48,881 INFO L93 Difference]: Finished difference Result 265 states and 320 transitions. [2021-10-16 02:35:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:35:48,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-16 02:35:48,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:48,883 INFO L225 Difference]: With dead ends: 265 [2021-10-16 02:35:48,883 INFO L226 Difference]: Without dead ends: 262 [2021-10-16 02:35:48,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 612.5ms TimeCoverageRelationStatistics Valid=296, Invalid=696, Unknown=0, NotChecked=0, Total=992 [2021-10-16 02:35:48,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-16 02:35:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 189. [2021-10-16 02:35:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 185 states have (on average 1.2054054054054053) internal successors, (223), 188 states have internal predecessors, (223), 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 02:35:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 223 transitions. [2021-10-16 02:35:48,896 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 223 transitions. Word has length 28 [2021-10-16 02:35:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:48,896 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 223 transitions. [2021-10-16 02:35:48,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:35:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 223 transitions. [2021-10-16 02:35:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 02:35:48,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:48,897 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:48,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-10-16 02:35:49,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-10-16 02:35:49,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2021-10-16 02:35:49,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:49,498 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash -726741123, now seen corresponding path program 1 times [2021-10-16 02:35:49,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:49,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058273547] [2021-10-16 02:35:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:49,499 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:49,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:49,500 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:49,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-16 02:35:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:50,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:35:50,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:50,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:50,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:50,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058273547] [2021-10-16 02:35:50,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058273547] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:50,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [965021886] [2021-10-16 02:35:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:50,815 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:50,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:35:50,816 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:35:50,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-10-16 02:35:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:35:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:52,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:52,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [965021886] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:52,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761313345] [2021-10-16 02:35:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:35:52,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:35:52,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:52,147 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:35:52,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-16 02:35:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:35:53,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:35:53,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:53,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:35:54,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761313345] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:35:54,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:35:54,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 12] total 35 [2021-10-16 02:35:54,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960183952] [2021-10-16 02:35:54,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-16 02:35:54,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:54,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-16 02:35:54,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2021-10-16 02:35:54,262 INFO L87 Difference]: Start difference. First operand 189 states and 223 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 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 02:35:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:57,012 INFO L93 Difference]: Finished difference Result 345 states and 410 transitions. [2021-10-16 02:35:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-16 02:35:57,013 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 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 34 [2021-10-16 02:35:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:57,014 INFO L225 Difference]: With dead ends: 345 [2021-10-16 02:35:57,014 INFO L226 Difference]: Without dead ends: 335 [2021-10-16 02:35:57,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2308.1ms TimeCoverageRelationStatistics Valid=891, Invalid=1971, Unknown=0, NotChecked=0, Total=2862 [2021-10-16 02:35:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-10-16 02:35:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 259. [2021-10-16 02:35:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 255 states have (on average 1.2431372549019608) internal successors, (317), 258 states have internal predecessors, (317), 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 02:35:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 317 transitions. [2021-10-16 02:35:57,032 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 317 transitions. Word has length 34 [2021-10-16 02:35:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:57,032 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 317 transitions. [2021-10-16 02:35:57,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 35 states have internal predecessors, (125), 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 02:35:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 317 transitions. [2021-10-16 02:35:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-16 02:35:57,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:57,033 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:57,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:57,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:57,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:57,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:35:57,635 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:57,635 INFO L82 PathProgramCache]: Analyzing trace with hash 684900318, now seen corresponding path program 2 times [2021-10-16 02:35:57,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:57,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957910494] [2021-10-16 02:35:57,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:35:57,636 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:57,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:57,636 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:57,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-16 02:35:58,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:35:58,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:35:58,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:35:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-10-16 02:35:58,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:35:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-10-16 02:35:58,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:35:58,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957910494] [2021-10-16 02:35:58,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957910494] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:35:58,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:35:58,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:35:58,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966222651] [2021-10-16 02:35:58,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:35:58,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:35:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:35:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:35:58,734 INFO L87 Difference]: Start difference. First operand 259 states and 317 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 02:35:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:35:58,796 INFO L93 Difference]: Finished difference Result 259 states and 317 transitions. [2021-10-16 02:35:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:35:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 52 [2021-10-16 02:35:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:35:58,799 INFO L225 Difference]: With dead ends: 259 [2021-10-16 02:35:58,799 INFO L226 Difference]: Without dead ends: 256 [2021-10-16 02:35:58,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:35:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-10-16 02:35:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-10-16 02:35:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 253 states have (on average 1.2134387351778657) internal successors, (307), 255 states have internal predecessors, (307), 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 02:35:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 307 transitions. [2021-10-16 02:35:58,820 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 307 transitions. Word has length 52 [2021-10-16 02:35:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:35:58,820 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 307 transitions. [2021-10-16 02:35:58,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 02:35:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 307 transitions. [2021-10-16 02:35:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-16 02:35:58,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:35:58,822 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:35:58,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-16 02:35:59,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:35:59,026 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:35:59,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:35:59,026 INFO L82 PathProgramCache]: Analyzing trace with hash -738905971, now seen corresponding path program 2 times [2021-10-16 02:35:59,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:35:59,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953880527] [2021-10-16 02:35:59,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:35:59,028 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:35:59,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:35:59,028 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:35:59,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-16 02:35:59,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:35:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:35:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:35:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:35:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-10-16 02:35:59,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:36:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-10-16 02:36:00,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:36:00,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953880527] [2021-10-16 02:36:00,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953880527] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:36:00,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:36:00,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:36:00,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685826627] [2021-10-16 02:36:00,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:36:00,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:36:00,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:36:00,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:36:00,132 INFO L87 Difference]: Start difference. First operand 256 states and 307 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 02:36:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:36:00,188 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2021-10-16 02:36:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:36:00,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) Word has length 56 [2021-10-16 02:36:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:36:00,190 INFO L225 Difference]: With dead ends: 256 [2021-10-16 02:36:00,190 INFO L226 Difference]: Without dead ends: 253 [2021-10-16 02:36:00,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:36:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-10-16 02:36:00,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-10-16 02:36:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.203187250996016) internal successors, (302), 252 states have internal predecessors, (302), 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 02:36:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 302 transitions. [2021-10-16 02:36:00,210 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 302 transitions. Word has length 56 [2021-10-16 02:36:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:36:00,211 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 302 transitions. [2021-10-16 02:36:00,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 02:36:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 302 transitions. [2021-10-16 02:36:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-16 02:36:00,212 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:36:00,212 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:36:00,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-16 02:36:00,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:36:00,415 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:36:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:36:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash 399089654, now seen corresponding path program 1 times [2021-10-16 02:36:00,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:36:00,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006911911] [2021-10-16 02:36:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:36:00,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:36:00,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:36:00,418 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:36:00,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-16 02:36:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:36:01,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:36:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:36:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:01,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:36:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:02,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:36:02,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006911911] [2021-10-16 02:36:02,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006911911] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:36:02,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1966270620] [2021-10-16 02:36:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:36:02,067 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:36:02,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:36:02,071 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:36:02,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-10-16 02:36:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:36:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:36:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:36:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:03,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:36:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:03,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1966270620] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:36:03,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808803550] [2021-10-16 02:36:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:36:03,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:36:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:36:03,798 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:36:03,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-16 02:36:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:36:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-16 02:36:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:36:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:05,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:36:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-10-16 02:36:06,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808803550] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:36:06,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:36:06,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14, 14, 14, 14, 21] total 44 [2021-10-16 02:36:06,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305308996] [2021-10-16 02:36:06,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:36:06,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:36:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:36:06,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-10-16 02:36:06,059 INFO L87 Difference]: Start difference. First operand 253 states and 302 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:36:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:36:06,624 INFO L93 Difference]: Finished difference Result 359 states and 424 transitions. [2021-10-16 02:36:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:36:06,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-16 02:36:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:36:06,627 INFO L225 Difference]: With dead ends: 359 [2021-10-16 02:36:06,627 INFO L226 Difference]: Without dead ends: 357 [2021-10-16 02:36:06,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1346.3ms TimeCoverageRelationStatistics Valid=661, Invalid=1889, Unknown=0, NotChecked=0, Total=2550 [2021-10-16 02:36:06,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-16 02:36:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 230. [2021-10-16 02:36:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1746724890829694) internal successors, (269), 229 states have internal predecessors, (269), 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 02:36:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 269 transitions. [2021-10-16 02:36:06,654 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 269 transitions. Word has length 59 [2021-10-16 02:36:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:36:06,655 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 269 transitions. [2021-10-16 02:36:06,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:36:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 269 transitions. [2021-10-16 02:36:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-16 02:36:06,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:36:06,657 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:36:06,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2021-10-16 02:36:06,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2021-10-16 02:36:07,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-16 02:36:07,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:36:07,258 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 15 more)] === [2021-10-16 02:36:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:36:07,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2146499331, now seen corresponding path program 2 times [2021-10-16 02:36:07,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:36:07,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576619364] [2021-10-16 02:36:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:36:07,260 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:36:07,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:36:07,260 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:36:07,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-16 02:36:08,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:36:08,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:36:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:36:08,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:36:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-10-16 02:36:08,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:36:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-10-16 02:36:08,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:36:08,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576619364] [2021-10-16 02:36:08,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576619364] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:36:08,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:36:08,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:36:08,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623788257] [2021-10-16 02:36:08,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:36:08,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:36:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:36:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:36:08,613 INFO L87 Difference]: Start difference. First operand 230 states and 269 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:36:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:36:08,663 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2021-10-16 02:36:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:36:08,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-10-16 02:36:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:36:08,663 INFO L225 Difference]: With dead ends: 230 [2021-10-16 02:36:08,664 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:36:08,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:36:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:36:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:36:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:36:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:36:08,666 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2021-10-16 02:36:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:36:08,666 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:36:08,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:36:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:36:08,666 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:36:08,668 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,669 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,669 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,669 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,670 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,670 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,670 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,670 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,671 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,671 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,671 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,671 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,672 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,672 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,672 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,672 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,672 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-16 02:36:08,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:36:08,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:36:08,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:36:09,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:36:10,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:36:11,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:36:11,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:36:11,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:36:14,831 INFO L857 garLoopResultBuilder]: For program point L126(line 126) no Hoare annotation was computed. [2021-10-16 02:36:14,832 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION(line 224) no Hoare annotation was computed. [2021-10-16 02:36:14,832 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 72) no Hoare annotation was computed. [2021-10-16 02:36:14,832 INFO L857 garLoopResultBuilder]: For program point L52(line 52) no Hoare annotation was computed. [2021-10-16 02:36:14,832 INFO L857 garLoopResultBuilder]: For program point L176(line 176) no Hoare annotation was computed. [2021-10-16 02:36:14,832 INFO L857 garLoopResultBuilder]: For program point L366(line 366) no Hoare annotation was computed. [2021-10-16 02:36:14,832 INFO L857 garLoopResultBuilder]: For program point L333(line 333) no Hoare annotation was computed. [2021-10-16 02:36:14,832 INFO L857 garLoopResultBuilder]: For program point L234(lines 234 242) no Hoare annotation was computed. [2021-10-16 02:36:14,832 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION(line 297) no Hoare annotation was computed. [2021-10-16 02:36:14,833 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 126) no Hoare annotation was computed. [2021-10-16 02:36:14,833 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:36:14,833 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:36:14,833 INFO L857 garLoopResultBuilder]: For program point L152(lines 152 160) no Hoare annotation was computed. [2021-10-16 02:36:14,833 INFO L857 garLoopResultBuilder]: For program point L309(line 309) no Hoare annotation was computed. [2021-10-16 02:36:14,833 INFO L857 garLoopResultBuilder]: For program point L20(lines 20 401) no Hoare annotation was computed. [2021-10-16 02:36:14,833 INFO L857 garLoopResultBuilder]: For program point L276(lines 276 391) no Hoare annotation was computed. [2021-10-16 02:36:14,833 INFO L860 garLoopResultBuilder]: At program point L400(lines 15 402) the Hoare annotation is: true [2021-10-16 02:36:14,834 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION(line 345) no Hoare annotation was computed. [2021-10-16 02:36:14,834 INFO L857 garLoopResultBuilder]: For program point L70(lines 70 94) no Hoare annotation was computed. [2021-10-16 02:36:14,834 INFO L853 garLoopResultBuilder]: At program point L384(lines 282 391) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~13 (_ bv1 32))) (.cse1 (bvsge (bvadd ULTIMATE.start_main_~main__tagbuf_len~0 (_ bv1 32)) (_ bv1 32)))) (or (and (= ULTIMATE.start_main_~__VERIFIER_assert__cond~12 (_ bv1 32)) (not (= ULTIMATE.start_main_~main__tagbuf_len~0 ULTIMATE.start_main_~main__t~0)) (= ULTIMATE.start_main_~main__t~0 (_ bv0 32)) .cse0 .cse1) (and (bvsle (bvadd ULTIMATE.start_main_~main__t~0 (_ bv1 32)) ULTIMATE.start_main_~main__tagbuf_len~0) (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0) (= ULTIMATE.start_main_~__VERIFIER_assert__cond~19 (_ bv1 32)) .cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~18 (_ bv1 32)) .cse1 (bvsle ULTIMATE.start_main_~main__t~0 ULTIMATE.start_main_~main__tagbuf_len~0)))) [2021-10-16 02:36:14,834 INFO L853 garLoopResultBuilder]: At program point L351(lines 32 395) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~main__t~0 (_ bv0 32))) (.cse8 (bvadd ULTIMATE.start_main_~main__t~0 (_ bv1 32)))) (let ((.cse2 (bvsle .cse8 ULTIMATE.start_main_~main__tagbuf_len~0)) (.cse3 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~17 (_ bv1 32))) (.cse4 (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0)) (.cse5 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~16 (_ bv1 32))) (.cse6 (bvsle (_ bv0 32) .cse8)) (.cse7 (or .cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~13 (_ bv1 32)))) (.cse1 (bvsge (bvadd ULTIMATE.start_main_~main__tagbuf_len~0 (_ bv1 32)) (_ bv1 32)))) (or (and (not (= ULTIMATE.start_main_~main__tagbuf_len~0 ULTIMATE.start_main_~main__t~0)) .cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~0 (_ bv1 32)) .cse1) (and .cse2 .cse3 .cse4 .cse5 (= ULTIMATE.start_main_~main__t~0 (_ bv1 32)) .cse6 .cse7 .cse1) (and .cse2 .cse3 .cse4 .cse5 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~19 (_ bv1 32)) .cse6 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~18 (_ bv1 32)) .cse7 .cse1)))) [2021-10-16 02:36:14,834 INFO L857 garLoopResultBuilder]: For program point L186(lines 186 196) no Hoare annotation was computed. [2021-10-16 02:36:14,834 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION(line 278) no Hoare annotation was computed. [2021-10-16 02:36:14,834 INFO L857 garLoopResultBuilder]: For program point L376(lines 376 385) no Hoare annotation was computed. [2021-10-16 02:36:14,835 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 352) no Hoare annotation was computed. [2021-10-16 02:36:14,835 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 114) no Hoare annotation was computed. [2021-10-16 02:36:14,835 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 203) no Hoare annotation was computed. [2021-10-16 02:36:14,835 INFO L857 garLoopResultBuilder]: For program point L236(line 236) no Hoare annotation was computed. [2021-10-16 02:36:14,835 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION(line 333) no Hoare annotation was computed. [2021-10-16 02:36:14,835 INFO L853 garLoopResultBuilder]: At program point L195(lines 56 253) the Hoare annotation is: (let ((.cse3 (bvadd ULTIMATE.start_main_~main__tagbuf_len~0 (_ bv1 32)))) (let ((.cse0 (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0)) (.cse1 (bvsge .cse3 (_ bv1 32))) (.cse2 (bvsle ULTIMATE.start_main_~main__t~0 ULTIMATE.start_main_~main__tagbuf_len~0))) (or (and .cse0 .cse1 (= (_ bv3 32) ULTIMATE.start_main_~main__t~0) .cse2) (and (= ULTIMATE.start_main_~main__t~0 (_ bv1 32)) (not (= .cse3 ULTIMATE.start_main_~main__t~0)) .cse1) (and .cse0 (= ULTIMATE.start_main_~__VERIFIER_assert__cond~16 (_ bv1 32)) (= ULTIMATE.start_main_~__VERIFIER_assert__cond~18 (_ bv1 32)) .cse1 .cse2) (and (= (_ bv2 32) ULTIMATE.start_main_~main__t~0) .cse1 .cse2) (and .cse0 (not (= ULTIMATE.start_main_~__VERIFIER_assert__cond~8 (_ bv0 32))) .cse1 .cse2)))) [2021-10-16 02:36:14,835 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 154) no Hoare annotation was computed. [2021-10-16 02:36:14,836 INFO L857 garLoopResultBuilder]: For program point L154(line 154) no Hoare annotation was computed. [2021-10-16 02:36:14,836 INFO L857 garLoopResultBuilder]: For program point L278(line 278) no Hoare annotation was computed. [2021-10-16 02:36:14,836 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION(line 378) no Hoare annotation was computed. [2021-10-16 02:36:14,836 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 209) no Hoare annotation was computed. [2021-10-16 02:36:14,836 INFO L857 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2021-10-16 02:36:14,836 INFO L857 garLoopResultBuilder]: For program point L39(lines 39 255) no Hoare annotation was computed. [2021-10-16 02:36:14,836 INFO L857 garLoopResultBuilder]: For program point L295(lines 295 317) no Hoare annotation was computed. [2021-10-16 02:36:14,836 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 142) no Hoare annotation was computed. [2021-10-16 02:36:14,837 INFO L857 garLoopResultBuilder]: For program point L188(line 188) no Hoare annotation was computed. [2021-10-16 02:36:14,837 INFO L857 garLoopResultBuilder]: For program point L378(line 378) no Hoare annotation was computed. [2021-10-16 02:36:14,837 INFO L857 garLoopResultBuilder]: For program point L345(line 345) no Hoare annotation was computed. [2021-10-16 02:36:14,837 INFO L857 garLoopResultBuilder]: For program point L114(line 114) no Hoare annotation was computed. [2021-10-16 02:36:14,837 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION(line 366) no Hoare annotation was computed. [2021-10-16 02:36:14,837 INFO L857 garLoopResultBuilder]: For program point L32(lines 32 395) no Hoare annotation was computed. [2021-10-16 02:36:14,837 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 390) no Hoare annotation was computed. [2021-10-16 02:36:14,837 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:36:14,838 INFO L857 garLoopResultBuilder]: For program point L222(lines 222 244) no Hoare annotation was computed. [2021-10-16 02:36:14,838 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION(line 188) no Hoare annotation was computed. [2021-10-16 02:36:14,838 INFO L857 garLoopResultBuilder]: For program point L24(lines 24 396) no Hoare annotation was computed. [2021-10-16 02:36:14,838 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 52) no Hoare annotation was computed. [2021-10-16 02:36:14,838 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 92) no Hoare annotation was computed. [2021-10-16 02:36:14,838 INFO L857 garLoopResultBuilder]: For program point L140(lines 140 162) no Hoare annotation was computed. [2021-10-16 02:36:14,838 INFO L857 garLoopResultBuilder]: For program point L297(line 297) no Hoare annotation was computed. [2021-10-16 02:36:14,839 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:36:14,839 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION(line 176) no Hoare annotation was computed. [2021-10-16 02:36:14,839 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 201) no Hoare annotation was computed. [2021-10-16 02:36:14,839 INFO L860 garLoopResultBuilder]: At program point L314(lines 32 395) the Hoare annotation is: true [2021-10-16 02:36:14,839 INFO L857 garLoopResultBuilder]: For program point L215(lines 215 250) no Hoare annotation was computed. [2021-10-16 02:36:14,839 INFO L857 garLoopResultBuilder]: For program point L50(lines 50 253) no Hoare annotation was computed. [2021-10-16 02:36:14,839 INFO L857 garLoopResultBuilder]: For program point L174(lines 174 198) no Hoare annotation was computed. [2021-10-16 02:36:14,839 INFO L857 garLoopResultBuilder]: For program point L364(lines 364 387) no Hoare annotation was computed. [2021-10-16 02:36:14,840 INFO L857 garLoopResultBuilder]: For program point L331(lines 331 354) no Hoare annotation was computed. [2021-10-16 02:36:14,840 INFO L857 garLoopResultBuilder]: For program point L265(lines 265 393) no Hoare annotation was computed. [2021-10-16 02:36:14,840 INFO L857 garLoopResultBuilder]: For program point L133(lines 133 200) no Hoare annotation was computed. [2021-10-16 02:36:14,840 INFO L857 garLoopResultBuilder]: For program point L224(line 224) no Hoare annotation was computed. [2021-10-16 02:36:14,840 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION(line 236) no Hoare annotation was computed. [2021-10-16 02:36:14,840 INFO L853 garLoopResultBuilder]: At program point L249(lines 101 251) the Hoare annotation is: (and (bvsle (bvadd ULTIMATE.start_main_~main__t~0 (_ bv1 32)) ULTIMATE.start_main_~main__tagbuf_len~0) (bvsle (_ bv0 32) ULTIMATE.start_main_~main__t~0) (bvsge (bvadd ULTIMATE.start_main_~main__tagbuf_len~0 (_ bv1 32)) (_ bv1 32)) (bvsle ULTIMATE.start_main_~main__t~0 ULTIMATE.start_main_~main__tagbuf_len~0)) [2021-10-16 02:36:14,840 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 84) no Hoare annotation was computed. [2021-10-16 02:36:14,841 INFO L857 garLoopResultBuilder]: For program point L84(line 84) no Hoare annotation was computed. [2021-10-16 02:36:14,841 INFO L857 garLoopResultBuilder]: For program point L307(lines 307 315) no Hoare annotation was computed. [2021-10-16 02:36:14,841 INFO L857 garLoopResultBuilder]: For program point L142(line 142) no Hoare annotation was computed. [2021-10-16 02:36:14,841 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION(line 309) no Hoare annotation was computed. [2021-10-16 02:36:14,841 INFO L857 garLoopResultBuilder]: For program point L101(lines 101 251) no Hoare annotation was computed. [2021-10-16 02:36:14,841 INFO L857 garLoopResultBuilder]: For program point L324(lines 324 389) no Hoare annotation was computed. [2021-10-16 02:36:14,846 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:36:14,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:36:14 BoogieIcfgContainer [2021-10-16 02:36:14,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:36:14,874 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:36:14,874 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:36:14,874 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:36:14,875 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:34:45" (3/4) ... [2021-10-16 02:36:14,878 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:36:14,894 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-16 02:36:14,895 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:36:14,896 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:36:14,897 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:36:14,962 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:36:14,963 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:36:14,964 INFO L168 Benchmark]: Toolchain (without parser) took 90743.95 ms. Allocated memory was 75.5 MB in the beginning and 182.5 MB in the end (delta: 107.0 MB). Free memory was 41.3 MB in the beginning and 47.5 MB in the end (delta: -6.2 MB). Peak memory consumption was 102.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:14,965 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 75.5 MB. Free memory was 57.7 MB in the beginning and 57.7 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:36:14,965 INFO L168 Benchmark]: CACSL2BoogieTranslator took 551.87 ms. Allocated memory is still 75.5 MB. Free memory was 41.1 MB in the beginning and 56.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:14,966 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.96 ms. Allocated memory is still 75.5 MB. Free memory was 55.9 MB in the beginning and 54.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:14,966 INFO L168 Benchmark]: Boogie Preprocessor took 32.29 ms. Allocated memory is still 75.5 MB. Free memory was 54.0 MB in the beginning and 52.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:36:14,966 INFO L168 Benchmark]: RCFGBuilder took 698.71 ms. Allocated memory is still 75.5 MB. Free memory was 52.3 MB in the beginning and 37.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:14,967 INFO L168 Benchmark]: TraceAbstraction took 89300.39 ms. Allocated memory was 75.5 MB in the beginning and 182.5 MB in the end (delta: 107.0 MB). Free memory was 37.2 MB in the beginning and 53.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 116.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:14,967 INFO L168 Benchmark]: Witness Printer took 88.99 ms. Allocated memory is still 182.5 MB. Free memory was 53.9 MB in the beginning and 47.5 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:14,970 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 75.5 MB. Free memory was 57.7 MB in the beginning and 57.7 MB in the end (delta: 63.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 551.87 ms. Allocated memory is still 75.5 MB. Free memory was 41.1 MB in the beginning and 56.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.96 ms. Allocated memory is still 75.5 MB. Free memory was 55.9 MB in the beginning and 54.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.29 ms. Allocated memory is still 75.5 MB. Free memory was 54.0 MB in the beginning and 52.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 698.71 ms. Allocated memory is still 75.5 MB. Free memory was 52.3 MB in the beginning and 37.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 89300.39 ms. Allocated memory was 75.5 MB in the beginning and 182.5 MB in the end (delta: 107.0 MB). Free memory was 37.2 MB in the beginning and 53.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 116.0 MB. Max. memory is 16.1 GB. * Witness Printer took 88.99 ms. Allocated memory is still 182.5 MB. Free memory was 53.9 MB in the beginning and 47.5 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 52]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 72]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 84]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 114]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 126]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 142]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 154]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 176]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 188]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 224]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 236]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 278]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 297]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 309]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 333]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 345]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 366]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 378]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 75 locations, 18 error locations. Started 1 CEGAR loops. OverallTime: 89188.7ms, OverallIterations: 33, TraceHistogramMax: 10, EmptinessCheckTime: 35.2ms, AutomataDifference: 21445.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 5943.3ms, InitialAbstractionConstructionTime: 15.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1455 SDtfs, 11772 SDslu, 7223 SDs, 0 SdLazy, 9802 SolverSat, 1796 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9951.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3146 GetRequests, 2470 SyntacticMatches, 0 SemanticMatches, 676 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6424 ImplicationChecksByTransitivity, 15584.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=259occurred in iteration=29, InterpolantAutomatonStates: 451, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 508.6ms AutomataMinimizationTime, 33 MinimizatonAttempts, 2812 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 60 NumberOfFragments, 232 HoareAnnotationTreeSize, 6 FomulaSimplifications, 6342831293 FormulaSimplificationTreeSizeReduction, 2266.3ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 1426392 FormulaSimplificationTreeSizeReductionInter, 3668.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 637.7ms SsaConstructionTime, 1999.1ms SatisfiabilityAnalysisTime, 22083.2ms InterpolantComputationTime, 1492 NumberOfCodeBlocks, 1357 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 2870 ConstructedInterpolants, 9 QuantifiedInterpolants, 12315 SizeOfPredicates, 231 NumberOfNonLiveVariables, 4487 ConjunctsInSsa, 583 ConjunctsInUnsatCore, 114 InterpolantComputations, 48 PerfectInterpolantSequences, 1105/2648 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 18 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((((!(main__tagbuf_len == main__t) && main__t == 0bv32) && __VERIFIER_assert__cond == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) || (((((((~bvsle32(~bvadd64(main__t, 1bv32), main__tagbuf_len) && __VERIFIER_assert__cond == 1bv32) && ~bvsle32(0bv32, main__t)) && __VERIFIER_assert__cond == 1bv32) && main__t == 1bv32) && ~bvsle32(0bv32, ~bvadd64(main__t, 1bv32))) && (main__t == 0bv32 || __VERIFIER_assert__cond == 1bv32)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32))) || ((((((((~bvsle32(~bvadd64(main__t, 1bv32), main__tagbuf_len) && __VERIFIER_assert__cond == 1bv32) && ~bvsle32(0bv32, main__t)) && __VERIFIER_assert__cond == 1bv32) && __VERIFIER_assert__cond == 1bv32) && ~bvsle32(0bv32, ~bvadd64(main__t, 1bv32))) && __VERIFIER_assert__cond == 1bv32) && (main__t == 0bv32 || __VERIFIER_assert__cond == 1bv32)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) - InvariantResult [Line: 101]: Loop Invariant Derived loop invariant: ((~bvsle32(~bvadd64(main__t, 1bv32), main__tagbuf_len) && ~bvsle32(0bv32, main__t)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len) - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: ((((((~bvsle32(0bv32, main__t) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && 3bv32 == main__t) && ~bvsle32(main__t, main__tagbuf_len)) || ((main__t == 1bv32 && !(~bvadd64(main__tagbuf_len, 1bv32) == main__t)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32))) || ((((~bvsle32(0bv32, main__t) && __VERIFIER_assert__cond == 1bv32) && __VERIFIER_assert__cond == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len))) || ((2bv32 == main__t && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len))) || (((~bvsle32(0bv32, main__t) && !(__VERIFIER_assert__cond == 0bv32)) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len)) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 282]: Loop Invariant Derived loop invariant: ((((__VERIFIER_assert__cond == 1bv32 && !(main__tagbuf_len == main__t)) && main__t == 0bv32) && __VERIFIER_assert__cond == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) || ((((((~bvsle32(~bvadd64(main__t, 1bv32), main__tagbuf_len) && ~bvsle32(0bv32, main__t)) && __VERIFIER_assert__cond == 1bv32) && __VERIFIER_assert__cond == 1bv32) && __VERIFIER_assert__cond == 1bv32) && ~bvsge32(~bvadd64(main__tagbuf_len, 1bv32), 1bv32)) && ~bvsle32(main__t, main__tagbuf_len)) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-16 02:36:15,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b73fee52-e1fb-4703-bd53-621944f66777/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...