./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1cc9cf79891afa42e51c5a84218adbd4a63e1151 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1cc9cf79891afa42e51c5a84218adbd4a63e1151 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:13:04,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:13:04,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:13:04,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:13:04,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:13:04,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:13:04,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:13:04,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:13:04,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:13:04,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:13:04,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:13:04,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:13:04,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:13:04,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:13:04,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:13:04,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:13:04,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:13:04,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:13:04,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:13:04,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:13:04,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:13:04,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:13:04,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:13:04,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:13:04,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:13:04,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:13:04,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:13:04,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:13:04,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:13:04,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:13:04,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:13:04,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:13:04,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:13:04,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:13:04,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:13:04,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:13:04,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:13:04,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:13:04,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:13:04,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:13:04,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:13:04,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:13:04,804 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:13:04,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:13:04,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:13:04,806 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:13:04,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:13:04,807 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:13:04,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:13:04,807 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:13:04,813 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:13:04,814 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:13:04,815 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:13:04,815 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:13:04,815 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:13:04,816 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:13:04,816 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:13:04,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:13:04,817 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:13:04,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:13:04,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:13:04,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:13:04,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:13:04,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:13:04,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:13:04,819 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:13:04,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:13:04,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:13:04,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:13:04,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:13:04,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:13:04,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:13:04,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:13:04,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:13:04,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:13:04,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:13:04,823 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:13:04,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:13:04,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:13:04,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:13:04,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:13:04,824 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_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cc9cf79891afa42e51c5a84218adbd4a63e1151 [2021-10-13 08:13:05,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:13:05,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:13:05,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:13:05,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:13:05,137 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:13:05,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-13 08:13:05,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data/681db29e9/dd8af4116d8547529bbce485aa5eff12/FLAG168022077 [2021-10-13 08:13:05,699 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:13:05,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-13 08:13:05,709 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data/681db29e9/dd8af4116d8547529bbce485aa5eff12/FLAG168022077 [2021-10-13 08:13:06,082 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data/681db29e9/dd8af4116d8547529bbce485aa5eff12 [2021-10-13 08:13:06,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:13:06,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:13:06,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:13:06,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:13:06,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:13:06,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2387a46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06, skipping insertion in model container [2021-10-13 08:13:06,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:13:06,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:13:06,262 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_8a83855f-380c-4f9d-af23-825cc15fc1b6/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-13 08:13:06,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:13:06,313 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:13:06,326 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_8a83855f-380c-4f9d-af23-825cc15fc1b6/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-13 08:13:06,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:13:06,345 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:13:06,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06 WrapperNode [2021-10-13 08:13:06,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:13:06,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:13:06,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:13:06,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:13:06,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:13:06,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:13:06,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:13:06,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:13:06,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:13:06,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:13:06,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:13:06,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:13:06,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (1/1) ... [2021-10-13 08:13:06,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:13:06,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:13:06,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:13:06,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:13:06,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:13:06,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:13:06,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:13:06,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:13:06,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:13:06,907 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 08:13:06,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:13:06 BoogieIcfgContainer [2021-10-13 08:13:06,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:13:06,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:13:06,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:13:06,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:13:06,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:13:06" (1/3) ... [2021-10-13 08:13:06,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18526037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:13:06, skipping insertion in model container [2021-10-13 08:13:06,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:06" (2/3) ... [2021-10-13 08:13:06,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18526037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:13:06, skipping insertion in model container [2021-10-13 08:13:06,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:13:06" (3/3) ... [2021-10-13 08:13:06,920 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2021-10-13 08:13:06,925 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:13:06,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-13 08:13:06,993 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:13:07,001 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:13:07,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-13 08:13:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:13:07,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:07,045 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:13:07,061 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:07,067 INFO L82 PathProgramCache]: Analyzing trace with hash 100327247, now seen corresponding path program 1 times [2021-10-13 08:13:07,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:13:07,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483669788] [2021-10-13 08:13:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:07,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:13:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:07,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:13:07,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483669788] [2021-10-13 08:13:07,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483669788] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:13:07,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:13:07,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:13:07,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728205751] [2021-10-13 08:13:07,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:13:07,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:13:07,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:13:07,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:13:07,268 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:07,281 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-10-13 08:13:07,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:13:07,282 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:13:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:07,290 INFO L225 Difference]: With dead ends: 25 [2021-10-13 08:13:07,290 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 08:13:07,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:13:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 08:13:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 08:13:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-13 08:13:07,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2021-10-13 08:13:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:07,321 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-13 08:13:07,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-13 08:13:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:13:07,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:07,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:13:07,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:13:07,324 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:07,324 INFO L82 PathProgramCache]: Analyzing trace with hash 99468274, now seen corresponding path program 1 times [2021-10-13 08:13:07,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:13:07,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82820101] [2021-10-13 08:13:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:07,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:13:07,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:13:07,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030665840] [2021-10-13 08:13:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:07,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:07,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:13:07,346 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:13:07,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:13:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:07,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:13:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:07,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:07,748 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:13:07,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82820101] [2021-10-13 08:13:07,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:13:07,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030665840] [2021-10-13 08:13:07,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030665840] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:13:07,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:13:07,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:13:07,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194595937] [2021-10-13 08:13:07,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:13:07,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:13:07,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:13:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:13:07,753 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:07,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:07,795 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-13 08:13:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:13:07,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:13:07,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:07,797 INFO L225 Difference]: With dead ends: 25 [2021-10-13 08:13:07,797 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 08:13:07,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:13:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 08:13:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-10-13 08:13:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-13 08:13:07,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 5 [2021-10-13 08:13:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:07,803 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-13 08:13:07,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:07,803 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-13 08:13:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:13:07,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:07,804 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:13:07,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:08,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:08,011 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:08,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1211488473, now seen corresponding path program 1 times [2021-10-13 08:13:08,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:13:08,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828560744] [2021-10-13 08:13:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:08,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:13:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:08,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:13:08,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828560744] [2021-10-13 08:13:08,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828560744] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:13:08,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:13:08,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:13:08,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494470763] [2021-10-13 08:13:08,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:13:08,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:13:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:13:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:13:08,074 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:08,088 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-13 08:13:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:13:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 08:13:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:08,089 INFO L225 Difference]: With dead ends: 18 [2021-10-13 08:13:08,089 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 08:13:08,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:13:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 08:13:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 08:13:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-13 08:13:08,093 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2021-10-13 08:13:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:08,093 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-13 08:13:08,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-13 08:13:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:13:08,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:08,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:13:08,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:13:08,095 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:08,096 INFO L82 PathProgramCache]: Analyzing trace with hash -263176832, now seen corresponding path program 1 times [2021-10-13 08:13:08,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:13:08,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208135754] [2021-10-13 08:13:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:08,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:13:08,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:13:08,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486330777] [2021-10-13 08:13:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:08,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:13:08,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:13:08,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:13:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:08,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:13:08,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:08,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:08,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:13:08,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208135754] [2021-10-13 08:13:08,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:13:08,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486330777] [2021-10-13 08:13:08,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486330777] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:13:08,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:13:08,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-10-13 08:13:08,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257481115] [2021-10-13 08:13:08,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:13:08,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:13:08,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:13:08,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:13:08,421 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:08,527 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-13 08:13:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:13:08,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 08:13:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:08,529 INFO L225 Difference]: With dead ends: 18 [2021-10-13 08:13:08,529 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 08:13:08,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:13:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 08:13:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-13 08:13:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-13 08:13:08,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-10-13 08:13:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:08,535 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-13 08:13:08,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-13 08:13:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:13:08,537 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:08,537 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:13:08,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:08,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:08,761 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:08,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1349036158, now seen corresponding path program 1 times [2021-10-13 08:13:08,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:13:08,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217955946] [2021-10-13 08:13:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:08,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:13:08,789 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:13:08,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790225956] [2021-10-13 08:13:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:08,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:08,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:13:08,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:13:08,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 08:13:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:08,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:13:08,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:09,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:13:09,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217955946] [2021-10-13 08:13:09,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:13:09,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790225956] [2021-10-13 08:13:09,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790225956] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:09,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843483380] [2021-10-13 08:13:09,032 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-13 08:13:09,033 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:13:09,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:13:09,046 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:13:09,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:13:09,101 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.1 percent of original size [2021-10-13 08:13:09,117 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:13:09,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:09,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:13:09,122 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:13:09,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:09,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:13:09,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-13 08:13:09,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-13 08:13:09,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:09,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:13:09,202 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:09,203 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:13:09,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:13:09,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:13:09,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:13:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:13:09,227 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 [2021-10-13 08:13:09,227 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:09,228 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:13:09,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:09,230 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:13:09,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 08:13:09,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:13:09,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:09,312 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:09,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 159 [2021-10-13 08:13:09,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:13:09,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:312, output treesize:159 [2021-10-13 08:13:09,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:09,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:09,549 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_22| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:13:09,553 INFO L168 Benchmark]: Toolchain (without parser) took 3467.12 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 56.1 MB in the beginning and 67.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:09,554 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:13:09,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.74 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 56.0 MB in the beginning and 91.7 MB in the end (delta: -35.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:09,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.38 ms. Allocated memory is still 115.3 MB. Free memory was 91.7 MB in the beginning and 90.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:09,559 INFO L168 Benchmark]: Boogie Preprocessor took 56.36 ms. Allocated memory is still 115.3 MB. Free memory was 90.5 MB in the beginning and 89.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:13:09,560 INFO L168 Benchmark]: RCFGBuilder took 454.37 ms. Allocated memory is still 115.3 MB. Free memory was 89.3 MB in the beginning and 74.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:09,561 INFO L168 Benchmark]: TraceAbstraction took 2640.39 ms. Allocated memory is still 115.3 MB. Free memory was 74.6 MB in the beginning and 67.8 MB in the end (delta: 6.8 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:13:09,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory is still 43.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.74 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 56.0 MB in the beginning and 91.7 MB in the end (delta: -35.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.38 ms. Allocated memory is still 115.3 MB. Free memory was 91.7 MB in the beginning and 90.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.36 ms. Allocated memory is still 115.3 MB. Free memory was 90.5 MB in the beginning and 89.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 454.37 ms. Allocated memory is still 115.3 MB. Free memory was 89.3 MB in the beginning and 74.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2640.39 ms. Allocated memory is still 115.3 MB. Free memory was 74.6 MB in the beginning and 67.8 MB in the end (delta: 6.8 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_22| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_22|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:13:09,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:13:12,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:13:12,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:13:12,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:13:12,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:13:12,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:13:12,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:13:12,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:13:12,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:13:12,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:13:12,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:13:12,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:13:12,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:13:12,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:13:12,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:13:12,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:13:12,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:13:12,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:13:12,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:13:12,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:13:12,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:13:12,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:13:12,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:13:12,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:13:12,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:13:12,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:13:12,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:13:12,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:13:12,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:13:12,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:13:12,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:13:12,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:13:12,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:13:12,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:13:12,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:13:12,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:13:12,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:13:12,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:13:12,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:13:12,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:13:12,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:13:12,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:13:12,289 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:13:12,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:13:12,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:13:12,291 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:13:12,292 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:13:12,292 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:13:12,292 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:13:12,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:13:12,293 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:13:12,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:13:12,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:13:12,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:13:12,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:13:12,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:13:12,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:13:12,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:13:12,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:13:12,297 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:13:12,297 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:13:12,298 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:13:12,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:13:12,298 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:13:12,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:13:12,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:13:12,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:13:12,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:13:12,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:13:12,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:13:12,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:13:12,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:13:12,300 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:13:12,301 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:13:12,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:13:12,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:13:12,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:13:12,302 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_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cc9cf79891afa42e51c5a84218adbd4a63e1151 [2021-10-13 08:13:12,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:13:12,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:13:12,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:13:12,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:13:12,729 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:13:12,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-13 08:13:12,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data/a9e01c202/56f0ef6c4caf4ebfb09de090e198ac25/FLAGf0cee49d0 [2021-10-13 08:13:13,307 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:13:13,307 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-10-13 08:13:13,316 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data/a9e01c202/56f0ef6c4caf4ebfb09de090e198ac25/FLAGf0cee49d0 [2021-10-13 08:13:13,681 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/data/a9e01c202/56f0ef6c4caf4ebfb09de090e198ac25 [2021-10-13 08:13:13,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:13:13,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:13:13,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:13:13,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:13:13,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:13:13,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:13:13" (1/1) ... [2021-10-13 08:13:13,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2abee428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:13, skipping insertion in model container [2021-10-13 08:13:13,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:13:13" (1/1) ... [2021-10-13 08:13:13,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:13:13,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:13:13,866 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_8a83855f-380c-4f9d-af23-825cc15fc1b6/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-13 08:13:13,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:13:13,894 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:13:13,961 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_8a83855f-380c-4f9d-af23-825cc15fc1b6/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-10-13 08:13:13,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:13:14,012 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:13:14,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14 WrapperNode [2021-10-13 08:13:14,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:13:14,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:13:14,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:13:14,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:13:14,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:13:14,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:13:14,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:13:14,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:13:14,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:13:14,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:13:14,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:13:14,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:13:14,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (1/1) ... [2021-10-13 08:13:14,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:13:14,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:13:14,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:13:14,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:13:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:13:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:13:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:13:14,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:13:14,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:13:14,574 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 08:13:14,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:13:14 BoogieIcfgContainer [2021-10-13 08:13:14,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:13:14,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:13:14,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:13:14,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:13:14,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:13:13" (1/3) ... [2021-10-13 08:13:14,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322d6637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:13:14, skipping insertion in model container [2021-10-13 08:13:14,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:13:14" (2/3) ... [2021-10-13 08:13:14,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322d6637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:13:14, skipping insertion in model container [2021-10-13 08:13:14,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:13:14" (3/3) ... [2021-10-13 08:13:14,584 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2021-10-13 08:13:14,590 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:13:14,598 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-13 08:13:14,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:13:14,710 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:13:14,710 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-13 08:13:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:13:14,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:14,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:13:14,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-10-13 08:13:14,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:13:14,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569303336] [2021-10-13 08:13:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:14,787 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:13:14,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:13:14,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:13:14,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:13:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:14,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:13:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:14,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:14,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:13:14,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569303336] [2021-10-13 08:13:14,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569303336] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:13:14,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:13:14,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:13:14,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588696808] [2021-10-13 08:13:14,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:13:14,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:13:15,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:13:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:13:15,010 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:15,025 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-13 08:13:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:13:15,026 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 08:13:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:15,034 INFO L225 Difference]: With dead ends: 39 [2021-10-13 08:13:15,034 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 08:13:15,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:13:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 08:13:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 08:13:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-13 08:13:15,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-10-13 08:13:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:15,068 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-13 08:13:15,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-13 08:13:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:13:15,069 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:15,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:13:15,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:15,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:13:15,282 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:15,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-13 08:13:15,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:13:15,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489973824] [2021-10-13 08:13:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:15,284 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:13:15,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:13:15,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:13:15,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:13:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:15,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:13:15,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:15,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:16,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:13:16,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489973824] [2021-10-13 08:13:16,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489973824] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:13:16,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:13:16,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-13 08:13:16,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318392686] [2021-10-13 08:13:16,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:13:16,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:13:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:13:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:13:16,029 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:18,650 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-10-13 08:13:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:13:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 08:13:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:18,654 INFO L225 Difference]: With dead ends: 41 [2021-10-13 08:13:18,654 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 08:13:18,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:13:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 08:13:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2021-10-13 08:13:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-13 08:13:18,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2021-10-13 08:13:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:18,663 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-13 08:13:18,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:18,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-13 08:13:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:13:18,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:18,665 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:13:18,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:18,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:13:18,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-10-13 08:13:18,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:13:18,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924004787] [2021-10-13 08:13:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:18,879 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:13:18,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:13:18,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:13:18,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:13:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:18,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:13:18,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:19,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:19,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:13:19,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924004787] [2021-10-13 08:13:19,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924004787] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:13:19,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:13:19,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 08:13:19,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165242789] [2021-10-13 08:13:19,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:13:19,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:13:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:13:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:13:19,113 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:19,220 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-10-13 08:13:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:13:19,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 08:13:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:19,223 INFO L225 Difference]: With dead ends: 39 [2021-10-13 08:13:19,223 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 08:13:19,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:13:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 08:13:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-10-13 08:13:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-10-13 08:13:19,233 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2021-10-13 08:13:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:19,234 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-10-13 08:13:19,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-10-13 08:13:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:13:19,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:19,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:13:19,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:19,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:13:19,446 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:19,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:19,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-10-13 08:13:19,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:13:19,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566084541] [2021-10-13 08:13:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:19,449 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:13:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:13:19,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:13:19,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:13:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:13:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:19,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:20,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:13:20,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566084541] [2021-10-13 08:13:20,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566084541] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:13:20,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:13:20,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-10-13 08:13:20,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311137555] [2021-10-13 08:13:20,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:13:20,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:13:20,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:13:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:13:20,478 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:21,751 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-13 08:13:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 08:13:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 08:13:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:21,755 INFO L225 Difference]: With dead ends: 39 [2021-10-13 08:13:21,755 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 08:13:21,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1120.2ms TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-10-13 08:13:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 08:13:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-13 08:13:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-10-13 08:13:21,770 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 13 [2021-10-13 08:13:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:21,770 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-10-13 08:13:21,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-10-13 08:13:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:13:21,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:21,773 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:13:21,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:21,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:13:21,988 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:21,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:21,989 INFO L82 PathProgramCache]: Analyzing trace with hash -558465920, now seen corresponding path program 1 times [2021-10-13 08:13:21,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:13:21,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650530710] [2021-10-13 08:13:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:21,990 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:13:21,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:13:21,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:13:21,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:13:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:22,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:13:22,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:22,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:23,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:13:23,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650530710] [2021-10-13 08:13:23,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650530710] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:23,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [270683662] [2021-10-13 08:13:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:23,547 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:13:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:13:23,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:13:23,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 08:13:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:13:23,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:24,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:24,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [270683662] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:24,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331916073] [2021-10-13 08:13:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:13:24,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:24,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:13:24,366 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:13:24,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 08:13:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:13:24,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:13:24,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:25,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:36,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331916073] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:36,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:13:36,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5, 5, 10, 6] total 20 [2021-10-13 08:13:36,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846678875] [2021-10-13 08:13:36,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 08:13:36,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:13:36,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 08:13:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=280, Unknown=3, NotChecked=0, Total=380 [2021-10-13 08:13:36,218 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:08,551 WARN L207 SmtUtils]: Spent 16.65 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-10-13 08:14:37,158 WARN L207 SmtUtils]: Spent 16.70 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-10-13 08:14:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:37,243 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-10-13 08:14:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 08:14:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 08:14:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:37,246 INFO L225 Difference]: With dead ends: 83 [2021-10-13 08:14:37,246 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 08:14:37,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 64375.1ms TimeCoverageRelationStatistics Valid=375, Invalid=948, Unknown=9, NotChecked=0, Total=1332 [2021-10-13 08:14:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 08:14:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 47. [2021-10-13 08:14:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-10-13 08:14:37,259 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 15 [2021-10-13 08:14:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:37,260 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-10-13 08:14:37,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-10-13 08:14:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 08:14:37,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:37,261 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:14:37,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 08:14:37,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:37,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-13 08:14:37,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:14:37,873 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:14:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:37,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1449988658, now seen corresponding path program 1 times [2021-10-13 08:14:37,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:14:37,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781954378] [2021-10-13 08:14:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:37,874 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:14:37,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:14:37,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:14:37,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:14:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:14:38,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:38,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:14:39,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:14:39,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781954378] [2021-10-13 08:14:39,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781954378] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:14:39,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:14:39,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-10-13 08:14:39,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142769822] [2021-10-13 08:14:39,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:14:39,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:14:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:14:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-13 08:14:39,671 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:40,406 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-10-13 08:14:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:14:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 08:14:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:40,407 INFO L225 Difference]: With dead ends: 51 [2021-10-13 08:14:40,407 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 08:14:40,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1312.6ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:14:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 08:14:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-13 08:14:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-10-13 08:14:40,423 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 18 [2021-10-13 08:14:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:40,424 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-10-13 08:14:40,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-10-13 08:14:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:14:40,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:40,425 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:14:40,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:40,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:14:40,639 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:14:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 1 times [2021-10-13 08:14:40,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:14:40,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884392656] [2021-10-13 08:14:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:40,640 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:14:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:14:40,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:14:40,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:14:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:14:40,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:40,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:41,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:14:41,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884392656] [2021-10-13 08:14:41,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884392656] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:41,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1440802892] [2021-10-13 08:14:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:41,067 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:14:41,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:14:41,084 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:14:41,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 08:14:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:14:41,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:41,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:41,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1440802892] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:41,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192653409] [2021-10-13 08:14:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:41,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:14:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:14:41,649 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:14:41,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 08:14:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:41,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:14:41,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:41,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:42,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192653409] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:42,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:14:42,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-13 08:14:42,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039422791] [2021-10-13 08:14:42,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:14:42,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:14:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:14:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:14:42,070 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:42,405 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2021-10-13 08:14:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 08:14:42,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 08:14:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:42,407 INFO L225 Difference]: With dead ends: 84 [2021-10-13 08:14:42,407 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 08:14:42,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:14:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 08:14:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-10-13 08:14:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2021-10-13 08:14:42,442 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 21 [2021-10-13 08:14:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:42,443 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2021-10-13 08:14:42,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2021-10-13 08:14:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 08:14:42,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:42,445 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:14:42,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:42,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:42,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-13 08:14:43,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:14:43,056 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:14:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1513887678, now seen corresponding path program 1 times [2021-10-13 08:14:43,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:14:43,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484682673] [2021-10-13 08:14:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:43,057 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:14:43,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:14:43,058 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:14:43,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 08:14:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:14:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:43,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:43,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:14:43,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484682673] [2021-10-13 08:14:43,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484682673] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:43,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2030925933] [2021-10-13 08:14:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:43,511 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:14:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:14:43,512 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:14:43,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 08:14:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:43,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:14:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:43,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:44,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2030925933] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:44,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434372589] [2021-10-13 08:14:44,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:44,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:14:44,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:14:44,029 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:14:44,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 08:14:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:44,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:14:44,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:44,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:44,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434372589] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:44,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:14:44,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 8 [2021-10-13 08:14:44,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164311630] [2021-10-13 08:14:44,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:14:44,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:14:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:14:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:14:44,541 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:44,700 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2021-10-13 08:14:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:14:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 08:14:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:44,704 INFO L225 Difference]: With dead ends: 148 [2021-10-13 08:14:44,704 INFO L226 Difference]: Without dead ends: 123 [2021-10-13 08:14:44,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:14:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-13 08:14:44,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2021-10-13 08:14:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 110 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) [2021-10-13 08:14:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2021-10-13 08:14:44,728 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 25 [2021-10-13 08:14:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:44,729 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2021-10-13 08:14:44,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:14:44,729 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2021-10-13 08:14:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 08:14:44,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:44,731 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:14:44,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:44,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:45,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:45,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:14:45,343 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:14:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1106341888, now seen corresponding path program 2 times [2021-10-13 08:14:45,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:14:45,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312922702] [2021-10-13 08:14:45,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:14:45,344 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:14:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:14:45,345 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:14:45,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 08:14:45,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:14:45,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:14:45,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 08:14:45,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:46,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:06,527 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_ULTIMATE.start_main_~y1~0 c_ULTIMATE.start_main_~x2~0))) (or (= (bvadd c_ULTIMATE.start_main_~y3~0 c_ULTIMATE.start_main_~x2~0 .cse0) (bvadd c_ULTIMATE.start_main_~x1~0 (_ bv1 32))) (not (= (bvadd c_ULTIMATE.start_main_~y2~0 (_ bv1 32)) c_ULTIMATE.start_main_~x2~0)) (not (= c_ULTIMATE.start_main_~x1~0 (bvadd c_ULTIMATE.start_main_~y2~0 c_ULTIMATE.start_main_~y3~0 .cse0))))) is different from true [2021-10-13 08:15:20,645 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_ULTIMATE.start_main_~y1~0 c_ULTIMATE.start_main_~x2~0))) (or (= (bvadd (_ bv2 32) c_ULTIMATE.start_main_~x1~0) (bvadd c_ULTIMATE.start_main_~y3~0 c_ULTIMATE.start_main_~x2~0 .cse0)) (not (= c_ULTIMATE.start_main_~x1~0 (bvadd c_ULTIMATE.start_main_~y2~0 c_ULTIMATE.start_main_~y3~0 .cse0))) (not (= c_ULTIMATE.start_main_~x2~0 (bvadd (_ bv2 32) c_ULTIMATE.start_main_~y2~0))))) is different from true [2021-10-13 08:15:43,438 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_ULTIMATE.start_main_~y1~0 c_ULTIMATE.start_main_~x2~0))) (or (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (= (bvadd (_ bv2 32) c_ULTIMATE.start_main_~x1~0) (bvadd c_ULTIMATE.start_main_~y3~0 c_ULTIMATE.start_main_~x2~0 .cse0)) (not (= c_ULTIMATE.start_main_~x1~0 (bvadd c_ULTIMATE.start_main_~y2~0 c_ULTIMATE.start_main_~y3~0 .cse0))) (not (= c_ULTIMATE.start_main_~x2~0 (bvadd (_ bv2 32) c_ULTIMATE.start_main_~y2~0))))) is different from true [2021-10-13 08:15:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2021-10-13 08:15:43,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:15:43,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312922702] [2021-10-13 08:15:43,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312922702] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:15:43,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1971081990] [2021-10-13 08:15:43,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:15:43,480 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:15:43,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:15:43,482 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:15:43,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-13 08:15:44,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:15:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:15:44,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 08:15:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:15:44,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:15:49,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1971081990] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:15:49,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376954369] [2021-10-13 08:15:49,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:15:49,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:15:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:15:49,217 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:15:49,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 08:15:49,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:15:49,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:15:49,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 08:15:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:15:50,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 08:16:01,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376954369] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:01,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:16:01,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14, 7, 14, 7] total 22 [2021-10-13 08:16:01,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057789871] [2021-10-13 08:16:01,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 08:16:01,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:01,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 08:16:01,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=249, Unknown=6, NotChecked=108, Total=462 [2021-10-13 08:16:01,131 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:16:07,941 WARN L207 SmtUtils]: Spent 6.08 s on a formula simplification that was a NOOP. DAG size: 21 [2021-10-13 08:16:36,545 WARN L207 SmtUtils]: Spent 26.24 s on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-10-13 08:17:01,058 WARN L207 SmtUtils]: Spent 12.13 s on a formula simplification that was a NOOP. DAG size: 29 [2021-10-13 08:17:13,559 WARN L207 SmtUtils]: Spent 8.11 s on a formula simplification that was a NOOP. DAG size: 30 [2021-10-13 08:17:24,824 WARN L207 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 22 [2021-10-13 08:17:33,205 WARN L207 SmtUtils]: Spent 8.11 s on a formula simplification that was a NOOP. DAG size: 23 [2021-10-13 08:17:51,660 WARN L207 SmtUtils]: Spent 12.14 s on a formula simplification that was a NOOP. DAG size: 30 [2021-10-13 08:18:06,525 WARN L207 SmtUtils]: Spent 8.14 s on a formula simplification that was a NOOP. DAG size: 31 [2021-10-13 08:18:19,071 WARN L207 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 19 [2021-10-13 08:18:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:18:25,807 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2021-10-13 08:18:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 08:18:25,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 08:18:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:18:25,812 INFO L225 Difference]: With dead ends: 148 [2021-10-13 08:18:25,812 INFO L226 Difference]: Without dead ends: 135 [2021-10-13 08:18:25,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 15 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 152040.6ms TimeCoverageRelationStatistics Valid=414, Invalid=979, Unknown=25, NotChecked=222, Total=1640 [2021-10-13 08:18:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-13 08:18:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-10-13 08:18:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 103 states have (on average 1.174757281553398) internal successors, (121), 104 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) [2021-10-13 08:18:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2021-10-13 08:18:25,841 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 25 [2021-10-13 08:18:25,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:18:25,842 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2021-10-13 08:18:25,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:25,842 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2021-10-13 08:18:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 08:18:25,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:18:25,844 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:18:25,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-10-13 08:18:26,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:26,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-13 08:18:26,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:18:26,448 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:18:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:18:26,448 INFO L82 PathProgramCache]: Analyzing trace with hash 957832704, now seen corresponding path program 3 times [2021-10-13 08:18:26,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:18:26,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967548390] [2021-10-13 08:18:26,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:18:26,449 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:18:26,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:18:26,450 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:18:26,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 08:18:26,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 08:18:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:18:27,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:18:27,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-13 08:18:28,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-13 08:18:30,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:18:30,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967548390] [2021-10-13 08:18:30,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967548390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:30,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1918674851] [2021-10-13 08:18:30,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:18:30,191 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:18:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:18:30,191 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:18:30,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-13 08:18:31,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 08:18:31,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:18:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:18:31,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-13 08:18:31,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-13 08:18:32,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1918674851] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:32,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211282050] [2021-10-13 08:18:32,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:18:32,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:18:32,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:18:32,113 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:18:32,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 08:18:34,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 08:18:34,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:18:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:18:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-13 08:18:37,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-13 08:18:38,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211282050] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:38,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:18:38,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 9, 6, 9, 6] total 14 [2021-10-13 08:18:38,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962952848] [2021-10-13 08:18:38,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 08:18:38,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:18:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 08:18:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=130, Unknown=1, NotChecked=0, Total=182 [2021-10-13 08:18:38,105 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:18:57,198 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2021-10-13 08:18:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 08:18:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 08:18:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:18:57,203 INFO L225 Difference]: With dead ends: 109 [2021-10-13 08:18:57,203 INFO L226 Difference]: Without dead ends: 107 [2021-10-13 08:18:57,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 6965.1ms TimeCoverageRelationStatistics Valid=128, Invalid=291, Unknown=1, NotChecked=0, Total=420 [2021-10-13 08:18:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-13 08:18:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2021-10-13 08:18:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-10-13 08:18:57,222 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 35 [2021-10-13 08:18:57,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:18:57,222 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-10-13 08:18:57,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:18:57,223 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-10-13 08:18:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 08:18:57,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:18:57,225 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:18:57,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:57,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-13 08:18:57,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:57,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:18:57,829 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:18:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:18:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 2 times [2021-10-13 08:18:57,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:18:57,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867002391] [2021-10-13 08:18:57,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:18:57,830 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:18:57,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:18:57,831 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:18:57,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 08:18:58,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:18:58,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 08:18:58,380 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:18:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:18:58,633 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:18:58,633 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:18:58,634 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:18:58,636 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:18:58,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:58,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:18:58,850 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:18:58,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:18:58 BoogieIcfgContainer [2021-10-13 08:18:58,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:18:58,898 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:18:58,898 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:18:58,898 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:18:58,899 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:13:14" (3/4) ... [2021-10-13 08:18:58,901 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:18:58,981 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:18:58,981 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:18:58,983 INFO L168 Benchmark]: Toolchain (without parser) took 345296.73 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 36.6 MB in the beginning and 29.1 MB in the end (delta: 7.5 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:58,983 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 39.8 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:18:58,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.23 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 36.4 MB in the beginning and 54.4 MB in the end (delta: -18.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:58,984 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.30 ms. Allocated memory is still 71.3 MB. Free memory was 54.2 MB in the beginning and 52.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:18:58,984 INFO L168 Benchmark]: Boogie Preprocessor took 52.41 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 51.7 MB in the end (delta: 986.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:18:58,985 INFO L168 Benchmark]: RCFGBuilder took 460.16 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 41.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:58,986 INFO L168 Benchmark]: TraceAbstraction took 344319.55 ms. Allocated memory is still 71.3 MB. Free memory was 41.0 MB in the beginning and 32.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:58,986 INFO L168 Benchmark]: Witness Printer took 83.92 ms. Allocated memory is still 71.3 MB. Free memory was 32.5 MB in the beginning and 29.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:18:58,989 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 39.8 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.23 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 36.4 MB in the beginning and 54.4 MB in the end (delta: -18.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.30 ms. Allocated memory is still 71.3 MB. Free memory was 54.2 MB in the beginning and 52.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.41 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 51.7 MB in the end (delta: 986.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 460.16 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 41.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 344319.55 ms. Allocated memory is still 71.3 MB. Free memory was 41.0 MB in the beginning and 32.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Witness Printer took 83.92 ms. Allocated memory is still 71.3 MB. Free memory was 32.5 MB in the beginning and 29.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND FALSE !(counter++<5) [L16] COND TRUE !(cond) VAL [counter=6] [L18] reach_error() VAL [counter=6] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 344154.6ms, OverallIterations: 11, TraceHistogramMax: 6, EmptinessCheckTime: 42.5ms, AutomataDifference: 230122.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 153 SDtfs, 513 SDslu, 545 SDs, 0 SdLazy, 636 SolverSat, 257 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 34154.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 897 GetRequests, 722 SyntacticMatches, 15 SemanticMatches, 160 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 226578.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=8, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 175.7ms AutomataMinimizationTime, 10 MinimizatonAttempts, 121 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 160.8ms SsaConstructionTime, 4315.3ms SatisfiabilityAnalysisTime, 100693.1ms InterpolantComputationTime, 461 NumberOfCodeBlocks, 401 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 810 ConstructedInterpolants, 7 QuantifiedInterpolants, 4468 SizeOfPredicates, 135 NumberOfNonLiveVariables, 1135 ConjunctsInSsa, 234 ConjunctsInUnsatCore, 40 InterpolantComputations, 9 PerfectInterpolantSequences, 524/758 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 08:18:59,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a83855f-380c-4f9d-af23-825cc15fc1b6/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...