./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/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 3e96cb4ee3629d1a348f46a0f60ddd51d5471587 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/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 3e96cb4ee3629d1a348f46a0f60ddd51d5471587 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:04:15,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:04:15,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:04:15,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:04:15,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:04:15,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:04:15,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:04:15,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:04:15,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:04:15,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:04:15,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:04:15,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:04:15,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:04:15,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:04:15,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:04:15,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:04:15,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:04:15,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:04:15,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:04:15,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:04:15,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:04:15,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:04:15,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:04:15,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:04:15,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:04:15,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:04:15,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:04:15,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:04:15,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:04:15,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:04:15,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:04:15,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:04:15,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:04:15,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:04:15,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:04:15,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:04:15,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:04:15,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:04:15,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:04:15,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:04:15,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:04:15,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:04:15,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:04:15,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:04:15,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:04:15,179 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:04:15,180 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:04:15,180 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:04:15,180 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:04:15,180 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:04:15,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:04:15,187 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:04:15,188 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:04:15,188 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:04:15,189 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:04:15,189 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:04:15,189 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:04:15,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:04:15,190 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:04:15,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:04:15,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:04:15,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:04:15,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:04:15,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:04:15,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:04:15,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:04:15,192 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:04:15,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:04:15,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:04:15,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:04:15,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:04:15,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:04:15,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:04:15,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:04:15,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:04:15,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:04:15,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:04:15,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:04:15,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:04:15,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:04:15,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:04:15,195 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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e96cb4ee3629d1a348f46a0f60ddd51d5471587 [2021-10-13 08:04:15,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:04:15,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:04:15,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:04:15,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:04:15,537 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:04:15,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-10-13 08:04:15,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data/1065105ec/f5b3681d28a64b2499f4b0cfccf81eee/FLAG1bcebc7db [2021-10-13 08:04:16,203 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:04:16,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-10-13 08:04:16,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data/1065105ec/f5b3681d28a64b2499f4b0cfccf81eee/FLAG1bcebc7db [2021-10-13 08:04:16,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data/1065105ec/f5b3681d28a64b2499f4b0cfccf81eee [2021-10-13 08:04:16,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:04:16,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:04:16,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:04:16,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:04:16,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:04:16,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35c4f2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16, skipping insertion in model container [2021-10-13 08:04:16,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:04:16,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:04:16,792 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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-10-13 08:04:16,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:04:16,844 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:04:16,858 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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-10-13 08:04:16,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:04:16,888 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:04:16,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16 WrapperNode [2021-10-13 08:04:16,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:04:16,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:04:16,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:04:16,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:04:16,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:04:16,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:04:16,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:04:16,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:04:16,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:17,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:04:17,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:04:17,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:04:17,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:04:17,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:17,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:04:17,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:17,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:04:17,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:04:17,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:04:17,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:04:17,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:04:17,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:04:17,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:04:17,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:04:17,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:04:17,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:04:17,798 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-10-13 08:04:17,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:17 BoogieIcfgContainer [2021-10-13 08:04:17,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:04:17,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:04:17,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:04:17,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:04:17,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:16" (1/3) ... [2021-10-13 08:04:17,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b22b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:17, skipping insertion in model container [2021-10-13 08:04:17,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16" (2/3) ... [2021-10-13 08:04:17,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b22b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:17, skipping insertion in model container [2021-10-13 08:04:17,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:17" (3/3) ... [2021-10-13 08:04:17,812 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-10-13 08:04:17,819 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:04:17,820 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:04:17,876 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:04:17,882 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 08:04:17,883 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:04:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 08:04:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:04:17,902 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:17,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:17,904 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:17,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:17,909 INFO L82 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2021-10-13 08:04:17,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:17,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497778758] [2021-10-13 08:04:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:17,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:18,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:04:18,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277742353] [2021-10-13 08:04:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:18,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:18,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:18,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:18,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:04:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:04:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:18,227 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 08:04:18,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:18,274 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 08:04:18,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:18,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497778758] [2021-10-13 08:04:18,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:04:18,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277742353] [2021-10-13 08:04:18,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277742353] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:18,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:18,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 08:04:18,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551405829] [2021-10-13 08:04:18,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:04:18,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:18,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:04:18,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:04:18,307 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 08:04:18,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:18,407 INFO L93 Difference]: Finished difference Result 36 states and 61 transitions. [2021-10-13 08:04:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:04:18,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 9 [2021-10-13 08:04:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:18,419 INFO L225 Difference]: With dead ends: 36 [2021-10-13 08:04:18,419 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 08:04:18,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:04:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 08:04:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-13 08:04:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 34 transitions. [2021-10-13 08:04:18,464 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 34 transitions. Word has length 9 [2021-10-13 08:04:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:18,465 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 34 transitions. [2021-10-13 08:04:18,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 08:04:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 34 transitions. [2021-10-13 08:04:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:04:18,468 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:18,468 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:18,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:18,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 08:04:18,687 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:18,688 INFO L82 PathProgramCache]: Analyzing trace with hash -521491338, now seen corresponding path program 1 times [2021-10-13 08:04:18,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:18,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997460179] [2021-10-13 08:04:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:18,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:18,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:04:18,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419976305] [2021-10-13 08:04:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:18,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:18,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:18,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:18,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:04:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:04:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:04:18,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:04:18,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:18,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997460179] [2021-10-13 08:04:18,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:04:18,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419976305] [2021-10-13 08:04:18,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419976305] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:18,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:18,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 08:04:18,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818043642] [2021-10-13 08:04:18,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:18,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:18,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:04:18,942 INFO L87 Difference]: Start difference. First operand 21 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 08:04:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:19,081 INFO L93 Difference]: Finished difference Result 60 states and 101 transitions. [2021-10-13 08:04:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 08:04:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:19,092 INFO L225 Difference]: With dead ends: 60 [2021-10-13 08:04:19,092 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 08:04:19,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:04:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 08:04:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-10-13 08:04:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 49 transitions. [2021-10-13 08:04:19,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 49 transitions. Word has length 13 [2021-10-13 08:04:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:19,118 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 49 transitions. [2021-10-13 08:04:19,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 08:04:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2021-10-13 08:04:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:04:19,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:19,120 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:19,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:19,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:19,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:19,348 INFO L82 PathProgramCache]: Analyzing trace with hash -13861158, now seen corresponding path program 1 times [2021-10-13 08:04:19,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:19,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318903395] [2021-10-13 08:04:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:19,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:19,356 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:04:19,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123073386] [2021-10-13 08:04:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:19,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:19,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:19,358 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:19,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 08:04:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:04:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-13 08:04:19,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-13 08:04:19,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318903395] [2021-10-13 08:04:19,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:04:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123073386] [2021-10-13 08:04:19,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123073386] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:19,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:19,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 08:04:19,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032244392] [2021-10-13 08:04:19,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:19,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:19,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:04:19,569 INFO L87 Difference]: Start difference. First operand 32 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 08:04:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:19,665 INFO L93 Difference]: Finished difference Result 89 states and 145 transitions. [2021-10-13 08:04:19,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:19,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 08:04:19,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:19,667 INFO L225 Difference]: With dead ends: 89 [2021-10-13 08:04:19,667 INFO L226 Difference]: Without dead ends: 61 [2021-10-13 08:04:19,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:04:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-13 08:04:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2021-10-13 08:04:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 08:04:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2021-10-13 08:04:19,678 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 21 [2021-10-13 08:04:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:19,679 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2021-10-13 08:04:19,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 08:04:19,679 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2021-10-13 08:04:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 08:04:19,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:19,685 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:19,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:19,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:19,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1865855654, now seen corresponding path program 1 times [2021-10-13 08:04:19,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:19,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058202002] [2021-10-13 08:04:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:19,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:19,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:04:19,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134767415] [2021-10-13 08:04:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:19,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:19,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:19,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 08:04:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:20,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:20,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 08:04:20,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 08:04:20,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:20,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058202002] [2021-10-13 08:04:20,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:04:20,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134767415] [2021-10-13 08:04:20,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134767415] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:20,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881947593] [2021-10-13 08:04:20,278 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-10-13 08:04:20,278 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:04:20,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:04:20,288 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:04:20,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:04:20,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:04:20,339 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:04:20,340 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:04:20,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-13 08:04:20,342 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:04:20,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:04:20,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-13 08:04:20,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-10-13 08:04:20,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:04:20,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 38 [2021-10-13 08:04:20,451 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:04:20,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-10-13 08:04:20,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:04:20,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-10-13 08:04:20,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:04:20,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-13 08:04:20,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:04:20,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:04:20,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:04:20,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:04:20,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 08:04:20,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:04:20,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:04:20,558 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:04:20,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 232 [2021-10-13 08:04:20,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:04:20,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:452, output treesize:232 [2021-10-13 08:04:20,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:20,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:20,771 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_34| 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 08:04:20,775 INFO L168 Benchmark]: Toolchain (without parser) took 4192.51 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 52.3 MB in the beginning and 48.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:20,775 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory is still 68.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:04:20,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.62 ms. Allocated memory is still 94.4 MB. Free memory was 52.0 MB in the beginning and 67.8 MB in the end (delta: -15.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:20,776 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.80 ms. Allocated memory is still 94.4 MB. Free memory was 67.8 MB in the beginning and 66.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:20,777 INFO L168 Benchmark]: Boogie Preprocessor took 55.29 ms. Allocated memory is still 94.4 MB. Free memory was 66.0 MB in the beginning and 64.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:04:20,777 INFO L168 Benchmark]: RCFGBuilder took 799.34 ms. Allocated memory is still 94.4 MB. Free memory was 64.4 MB in the beginning and 46.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:20,778 INFO L168 Benchmark]: TraceAbstraction took 2969.83 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 46.1 MB in the beginning and 48.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 19.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:20,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory is still 68.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.62 ms. Allocated memory is still 94.4 MB. Free memory was 52.0 MB in the beginning and 67.8 MB in the end (delta: -15.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.80 ms. Allocated memory is still 94.4 MB. Free memory was 67.8 MB in the beginning and 66.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.29 ms. Allocated memory is still 94.4 MB. Free memory was 66.0 MB in the beginning and 64.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 799.34 ms. Allocated memory is still 94.4 MB. Free memory was 64.4 MB in the beginning and 46.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2969.83 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 46.1 MB in the beginning and 48.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 19.1 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_34| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_34|: 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 08:04:20,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/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 08:04:23,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:04:23,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:04:23,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:04:23,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:04:23,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:04:23,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:04:23,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:04:23,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:04:23,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:04:23,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:04:23,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:04:23,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:04:23,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:04:23,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:04:23,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:04:23,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:04:23,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:04:23,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:04:23,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:04:23,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:04:23,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:04:23,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:04:23,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:04:23,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:04:23,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:04:23,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:04:23,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:04:23,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:04:23,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:04:23,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:04:23,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:04:23,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:04:23,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:04:23,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:04:23,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:04:23,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:04:23,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:04:23,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:04:23,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:04:23,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:04:23,319 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:04:23,346 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:04:23,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:04:23,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:04:23,347 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:04:23,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:04:23,348 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:04:23,348 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:04:23,348 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:04:23,348 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:04:23,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:04:23,349 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:04:23,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:04:23,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:04:23,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:04:23,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:04:23,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:04:23,350 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:04:23,351 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:04:23,351 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:04:23,351 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:04:23,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:04:23,351 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:04:23,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:04:23,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:04:23,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:04:23,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:04:23,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:04:23,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:04:23,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:04:23,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:04:23,353 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:04:23,353 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:23,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:04:23,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:04:23,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:04:23,354 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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e96cb4ee3629d1a348f46a0f60ddd51d5471587 [2021-10-13 08:04:23,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:04:23,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:04:23,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:04:23,740 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:04:23,741 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:04:23,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-10-13 08:04:23,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data/df75aed6d/d3ada4f1d0e4429890014c2466221393/FLAG513b435ac [2021-10-13 08:04:24,421 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:04:24,424 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-10-13 08:04:24,434 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data/df75aed6d/d3ada4f1d0e4429890014c2466221393/FLAG513b435ac [2021-10-13 08:04:24,801 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/data/df75aed6d/d3ada4f1d0e4429890014c2466221393 [2021-10-13 08:04:24,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:04:24,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:04:24,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:04:24,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:04:24,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:04:24,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:24" (1/1) ... [2021-10-13 08:04:24,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f44a0ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:24, skipping insertion in model container [2021-10-13 08:04:24,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:24" (1/1) ... [2021-10-13 08:04:24,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:04:24,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:04:24,966 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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-10-13 08:04:24,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:04:25,029 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:04:25,047 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_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-10-13 08:04:25,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:04:25,081 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:04:25,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25 WrapperNode [2021-10-13 08:04:25,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:04:25,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:04:25,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:04:25,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:04:25,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:04:25,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:04:25,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:04:25,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:04:25,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:04:25,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:04:25,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:04:25,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:04:25,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (1/1) ... [2021-10-13 08:04:25,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:04:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:25,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:04:25,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:04:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:04:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:04:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 08:04:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:04:25,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:04:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:04:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 08:04:25,757 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:04:25,758 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-10-13 08:04:25,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:25 BoogieIcfgContainer [2021-10-13 08:04:25,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:04:25,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:04:25,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:04:25,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:04:25,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:24" (1/3) ... [2021-10-13 08:04:25,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef55a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:25, skipping insertion in model container [2021-10-13 08:04:25,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:25" (2/3) ... [2021-10-13 08:04:25,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef55a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:25, skipping insertion in model container [2021-10-13 08:04:25,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:25" (3/3) ... [2021-10-13 08:04:25,768 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-10-13 08:04:25,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:04:25,774 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:04:25,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:04:25,847 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 08:04:25,847 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:04:25,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:25,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:04:25,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:25,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:25,886 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1247519481, now seen corresponding path program 1 times [2021-10-13 08:04:25,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:25,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261017419] [2021-10-13 08:04:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:25,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:25,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:25,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:25,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:04:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:26,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:04:26,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:26,195 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 08:04:26,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:26,259 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 08:04:26,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:26,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261017419] [2021-10-13 08:04:26,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261017419] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:26,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:26,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:04:26,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536562197] [2021-10-13 08:04:26,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:04:26,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:26,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:04:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:04:26,287 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 08:04:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:26,310 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2021-10-13 08:04:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:04:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 08:04:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:26,321 INFO L225 Difference]: With dead ends: 67 [2021-10-13 08:04:26,321 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 08:04:26,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 08:04:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 08:04:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-13 08:04:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 08:04:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 08:04:26,362 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 15 [2021-10-13 08:04:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:26,363 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 08:04:26,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 08:04:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 08:04:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:04:26,364 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:26,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:26,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:26,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:04:26,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash -5605811, now seen corresponding path program 1 times [2021-10-13 08:04:26,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:26,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630397397] [2021-10-13 08:04:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:26,571 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:26,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:26,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:26,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:04:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:04:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:26,801 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 08:04:26,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:26,906 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 08:04:26,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:26,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630397397] [2021-10-13 08:04:26,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630397397] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:26,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:26,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:04:26,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544573344] [2021-10-13 08:04:26,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:26,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:26,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:26,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:04:26,913 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 08:04:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:27,380 INFO L93 Difference]: Finished difference Result 81 states and 112 transitions. [2021-10-13 08:04:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:27,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 15 [2021-10-13 08:04:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:27,384 INFO L225 Difference]: With dead ends: 81 [2021-10-13 08:04:27,384 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 08:04:27,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:04:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 08:04:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2021-10-13 08:04:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 08:04:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-10-13 08:04:27,396 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 15 [2021-10-13 08:04:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:27,397 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-10-13 08:04:27,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 08:04:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-10-13 08:04:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:04:27,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:27,399 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:27,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:27,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:04:27,611 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:27,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:27,612 INFO L82 PathProgramCache]: Analyzing trace with hash 300864557, now seen corresponding path program 1 times [2021-10-13 08:04:27,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:27,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743701731] [2021-10-13 08:04:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:27,613 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:27,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:27,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:27,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:04:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:27,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:04:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:04:27,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:04:27,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:27,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743701731] [2021-10-13 08:04:27,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743701731] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:27,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:27,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:04:27,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379420546] [2021-10-13 08:04:27,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:27,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:04:27,906 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:28,381 INFO L93 Difference]: Finished difference Result 99 states and 140 transitions. [2021-10-13 08:04:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:28,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 08:04:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:28,383 INFO L225 Difference]: With dead ends: 99 [2021-10-13 08:04:28,383 INFO L226 Difference]: Without dead ends: 70 [2021-10-13 08:04:28,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:04:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-13 08:04:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 51. [2021-10-13 08:04:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-10-13 08:04:28,396 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 21 [2021-10-13 08:04:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:28,408 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-10-13 08:04:28,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-10-13 08:04:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 08:04:28,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:28,410 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:28,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:28,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:04:28,611 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:28,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1242071021, now seen corresponding path program 1 times [2021-10-13 08:04:28,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:28,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591277232] [2021-10-13 08:04:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:28,612 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:28,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:28,614 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:28,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:04:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:28,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:04:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 08:04:28,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 08:04:28,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:29,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591277232] [2021-10-13 08:04:29,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591277232] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:29,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:29,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:04:29,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293091344] [2021-10-13 08:04:29,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:29,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:29,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:29,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:04:29,002 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 08:04:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:29,450 INFO L93 Difference]: Finished difference Result 134 states and 190 transitions. [2021-10-13 08:04:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:29,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 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 33 [2021-10-13 08:04:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:29,453 INFO L225 Difference]: With dead ends: 134 [2021-10-13 08:04:29,453 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 08:04:29,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:04:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 08:04:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2021-10-13 08:04:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 08:04:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-10-13 08:04:29,469 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 33 [2021-10-13 08:04:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:29,469 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-10-13 08:04:29,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states 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 08:04:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-10-13 08:04:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 08:04:29,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:29,471 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:29,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:29,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:04:29,684 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:29,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1721257363, now seen corresponding path program 1 times [2021-10-13 08:04:29,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:29,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326069633] [2021-10-13 08:04:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:29,689 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:29,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:29,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:04:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:29,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 08:04:30,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 08:04:30,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:30,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326069633] [2021-10-13 08:04:30,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326069633] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:30,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982449473] [2021-10-13 08:04:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:30,320 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:30,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:04:30,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:04:30,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 08:04:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 08:04:30,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 08:04:30,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [982449473] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:30,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256872678] [2021-10-13 08:04:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:30,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:30,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:30,876 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:30,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 08:04:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:31,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:04:31,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 08:04:31,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 08:04:31,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256872678] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:31,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:04:31,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-13 08:04:31,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802272418] [2021-10-13 08:04:31,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:31,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:31,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:31,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:04:31,769 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:32,109 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2021-10-13 08:04:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:32,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-13 08:04:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:32,111 INFO L225 Difference]: With dead ends: 100 [2021-10-13 08:04:32,111 INFO L226 Difference]: Without dead ends: 76 [2021-10-13 08:04:32,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:04:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-13 08:04:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-10-13 08:04:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 08:04:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2021-10-13 08:04:32,125 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 41 [2021-10-13 08:04:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:32,126 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2021-10-13 08:04:32,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2021-10-13 08:04:32,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 08:04:32,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:32,138 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:32,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:32,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-13 08:04:32,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 08:04:32,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:04:32,741 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash -34624755, now seen corresponding path program 1 times [2021-10-13 08:04:32,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:32,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144939616] [2021-10-13 08:04:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:32,744 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:32,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:32,745 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:32,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:04:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-13 08:04:33,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-13 08:04:33,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:33,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144939616] [2021-10-13 08:04:33,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144939616] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:33,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [242594332] [2021-10-13 08:04:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:33,385 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:33,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:04:33,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:04:33,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 08:04:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:33,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-13 08:04:33,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-10-13 08:04:33,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [242594332] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:33,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548666742] [2021-10-13 08:04:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:33,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:33,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:34,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 08:04:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:34,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:04:34,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-13 08:04:34,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-13 08:04:34,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548666742] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:34,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:04:34,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-13 08:04:34,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114508348] [2021-10-13 08:04:34,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:34,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:04:34,908 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 08:04:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:35,237 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2021-10-13 08:04:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 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 47 [2021-10-13 08:04:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:35,239 INFO L225 Difference]: With dead ends: 118 [2021-10-13 08:04:35,239 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 08:04:35,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:04:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 08:04:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2021-10-13 08:04:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:04:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2021-10-13 08:04:35,253 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 47 [2021-10-13 08:04:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:35,254 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2021-10-13 08:04:35,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 08:04:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2021-10-13 08:04:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 08:04:35,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:35,256 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:35,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:35,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:35,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:35,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:04:35,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:35,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2065474483, now seen corresponding path program 1 times [2021-10-13 08:04:35,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:35,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246854327] [2021-10-13 08:04:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:35,885 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:35,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:35,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:35,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 08:04:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:36,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-13 08:04:36,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-13 08:04:36,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:36,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246854327] [2021-10-13 08:04:36,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246854327] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:36,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1458559390] [2021-10-13 08:04:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:36,635 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:36,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:04:36,637 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:04:36,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 08:04:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:37,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-13 08:04:37,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-13 08:04:37,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1458559390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:37,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096673071] [2021-10-13 08:04:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:37,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:37,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:37,332 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:37,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 08:04:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:37,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:04:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-10-13 08:04:38,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-10-13 08:04:38,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096673071] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:38,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:04:38,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 13 [2021-10-13 08:04:38,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738504037] [2021-10-13 08:04:38,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:38,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:38,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:38,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-10-13 08:04:38,404 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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 08:04:38,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:38,712 INFO L93 Difference]: Finished difference Result 130 states and 173 transitions. [2021-10-13 08:04:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:38,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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 59 [2021-10-13 08:04:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:38,714 INFO L225 Difference]: With dead ends: 130 [2021-10-13 08:04:38,714 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 08:04:38,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:04:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 08:04:38,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-10-13 08:04:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2727272727272727) internal successors, (112), 88 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 08:04:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2021-10-13 08:04:38,739 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 59 [2021-10-13 08:04:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:38,740 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2021-10-13 08:04:38,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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 08:04:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2021-10-13 08:04:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-13 08:04:38,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:38,747 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:38,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:38,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:39,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:39,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:39,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:39,356 INFO L82 PathProgramCache]: Analyzing trace with hash 716220365, now seen corresponding path program 1 times [2021-10-13 08:04:39,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:39,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075006828] [2021-10-13 08:04:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:39,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:39,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:39,358 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:39,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 08:04:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:39,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:39,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 08:04:40,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 08:04:40,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:40,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075006828] [2021-10-13 08:04:40,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075006828] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:40,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2125287499] [2021-10-13 08:04:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:40,385 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:40,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:04:40,391 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:04:40,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 08:04:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:41,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 08:04:41,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 08:04:41,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2125287499] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:41,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835106628] [2021-10-13 08:04:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:41,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:41,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:41,392 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:41,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 08:04:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:04:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-13 08:04:42,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-13 08:04:42,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835106628] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:42,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:04:42,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-13 08:04:42,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333735056] [2021-10-13 08:04:42,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:42,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:42,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:42,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:04:42,655 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 08:04:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:43,208 INFO L93 Difference]: Finished difference Result 205 states and 260 transitions. [2021-10-13 08:04:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 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 67 [2021-10-13 08:04:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:43,219 INFO L225 Difference]: With dead ends: 205 [2021-10-13 08:04:43,219 INFO L226 Difference]: Without dead ends: 153 [2021-10-13 08:04:43,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:04:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-13 08:04:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 95. [2021-10-13 08:04:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 94 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 08:04:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2021-10-13 08:04:43,244 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 67 [2021-10-13 08:04:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:43,246 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2021-10-13 08:04:43,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 08:04:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2021-10-13 08:04:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-13 08:04:43,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:43,249 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:43,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:43,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-10-13 08:04:43,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:43,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:43,862 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1406176013, now seen corresponding path program 1 times [2021-10-13 08:04:43,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:43,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307427515] [2021-10-13 08:04:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:43,864 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:43,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:43,864 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:43,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 08:04:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-13 08:04:44,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-13 08:04:44,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:44,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307427515] [2021-10-13 08:04:44,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307427515] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:44,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1213878391] [2021-10-13 08:04:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:44,869 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:44,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:04:44,869 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:04:44,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 08:04:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:45,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:45,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-13 08:04:45,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-13 08:04:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1213878391] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:45,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569075124] [2021-10-13 08:04:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:45,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:45,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:45,963 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 08:04:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:04:46,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-10-13 08:04:46,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-10-13 08:04:47,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569075124] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:47,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:04:47,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-13 08:04:47,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855298898] [2021-10-13 08:04:47,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:47,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:47,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:47,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:04:47,244 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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 08:04:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:47,895 INFO L93 Difference]: Finished difference Result 183 states and 233 transitions. [2021-10-13 08:04:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:47,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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 73 [2021-10-13 08:04:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:47,897 INFO L225 Difference]: With dead ends: 183 [2021-10-13 08:04:47,897 INFO L226 Difference]: Without dead ends: 124 [2021-10-13 08:04:47,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:04:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-13 08:04:47,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 103. [2021-10-13 08:04:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2745098039215685) internal successors, (130), 102 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 08:04:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2021-10-13 08:04:47,915 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 73 [2021-10-13 08:04:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:47,915 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2021-10-13 08:04:47,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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 08:04:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2021-10-13 08:04:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-13 08:04:47,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:47,923 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:47,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:48,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:48,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:48,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:48,541 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1509250675, now seen corresponding path program 1 times [2021-10-13 08:04:48,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:48,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239580034] [2021-10-13 08:04:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:48,542 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:48,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:48,543 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:48,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 08:04:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:49,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:49,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-13 08:04:49,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-13 08:04:49,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:49,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239580034] [2021-10-13 08:04:49,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239580034] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:49,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1382436659] [2021-10-13 08:04:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:49,711 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:49,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:04:49,712 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:04:49,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 08:04:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-13 08:04:50,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-13 08:04:50,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1382436659] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:50,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343856279] [2021-10-13 08:04:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:50,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:50,938 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:50,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 08:04:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:51,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:04:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-10-13 08:04:52,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-10-13 08:04:52,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343856279] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:52,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:04:52,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-13 08:04:52,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610483920] [2021-10-13 08:04:52,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:04:52,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:04:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:04:52,278 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 08:04:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:52,680 INFO L93 Difference]: Finished difference Result 188 states and 242 transitions. [2021-10-13 08:04:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:04:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 85 [2021-10-13 08:04:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:52,682 INFO L225 Difference]: With dead ends: 188 [2021-10-13 08:04:52,682 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 08:04:52,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:04:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 08:04:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2021-10-13 08:04:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2545454545454546) internal successors, (138), 110 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 08:04:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2021-10-13 08:04:52,697 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 85 [2021-10-13 08:04:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:52,697 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2021-10-13 08:04:52,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 08:04:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2021-10-13 08:04:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-13 08:04:52,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:52,699 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:52,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:52,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:53,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:53,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:04:53,303 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:53,304 INFO L82 PathProgramCache]: Analyzing trace with hash 527992973, now seen corresponding path program 1 times [2021-10-13 08:04:53,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:04:53,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007901489] [2021-10-13 08:04:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:53,305 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:04:53,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:04:53,306 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:04:53,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 08:04:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:54,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-10-13 08:04:54,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-10-13 08:04:54,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:04:54,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007901489] [2021-10-13 08:04:54,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007901489] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:54,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [64359561] [2021-10-13 08:04:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:54,632 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:04:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:04:54,633 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:04:54,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-13 08:04:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:55,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-10-13 08:04:55,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-10-13 08:04:56,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [64359561] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:56,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706920840] [2021-10-13 08:04:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:56,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:56,087 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:56,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 08:04:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:04:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-10-13 08:04:57,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-10-13 08:04:57,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706920840] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:57,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:04:57,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 16 [2021-10-13 08:04:57,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901661553] [2021-10-13 08:04:57,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 08:04:57,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:57,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 08:04:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:04:57,914 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 08:05:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:05:03,601 INFO L93 Difference]: Finished difference Result 949 states and 1285 transitions. [2021-10-13 08:05:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-13 08:05:03,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 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 93 [2021-10-13 08:05:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:05:03,608 INFO L225 Difference]: With dead ends: 949 [2021-10-13 08:05:03,608 INFO L226 Difference]: Without dead ends: 847 [2021-10-13 08:05:03,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1682.6ms TimeCoverageRelationStatistics Valid=948, Invalid=2358, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 08:05:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-10-13 08:05:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 235. [2021-10-13 08:05:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.205128205128205) internal successors, (282), 234 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 08:05:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2021-10-13 08:05:03,652 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 93 [2021-10-13 08:05:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:05:03,652 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2021-10-13 08:05:03,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 08:05:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2021-10-13 08:05:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-10-13 08:05:03,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:05:03,656 INFO L512 BasicCegarLoop]: trace histogram [72, 12, 12, 12, 8, 8, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:05:03,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 08:05:03,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-13 08:05:04,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-13 08:05:04,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:05:04,284 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:05:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:05:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2138298317, now seen corresponding path program 2 times [2021-10-13 08:05:04,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:05:04,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211760112] [2021-10-13 08:05:04,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:05:04,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:05:04,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:05:04,286 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:05:04,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 08:05:05,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:05:05,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:05:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:05:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:05:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 562 proven. 21 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2021-10-13 08:05:06,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:05:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 562 proven. 21 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2021-10-13 08:05:07,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:05:07,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211760112] [2021-10-13 08:05:07,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211760112] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:05:07,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [665885549] [2021-10-13 08:05:07,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:05:07,018 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:05:07,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:05:07,032 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:05:07,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-13 08:05:08,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:05:08,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:05:08,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:05:08,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:05:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 562 proven. 21 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2021-10-13 08:05:09,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:05:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 562 proven. 21 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2021-10-13 08:05:09,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [665885549] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:05:09,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369477744] [2021-10-13 08:05:09,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:05:09,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:05:09,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:05:09,803 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:05:09,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 08:05:11,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:05:11,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:05:11,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:05:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:05:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2021-10-13 08:05:13,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:05:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2021-10-13 08:05:14,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369477744] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:05:14,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:05:14,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 6, 6] total 26 [2021-10-13 08:05:14,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876903642] [2021-10-13 08:05:14,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 08:05:14,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:05:14,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 08:05:14,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-10-13 08:05:14,048 INFO L87 Difference]: Start difference. First operand 235 states and 282 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:05:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:05:24,021 INFO L93 Difference]: Finished difference Result 1002 states and 1372 transitions. [2021-10-13 08:05:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-13 08:05:24,022 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-10-13 08:05:24,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:05:24,027 INFO L225 Difference]: With dead ends: 1002 [2021-10-13 08:05:24,027 INFO L226 Difference]: Without dead ends: 780 [2021-10-13 08:05:24,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1221 GetRequests, 1128 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 5756.7ms TimeCoverageRelationStatistics Valid=2024, Invalid=6906, Unknown=0, NotChecked=0, Total=8930 [2021-10-13 08:05:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-10-13 08:05:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 511. [2021-10-13 08:05:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.1490196078431372) internal successors, (586), 510 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 08:05:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 586 transitions. [2021-10-13 08:05:24,099 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 586 transitions. Word has length 193 [2021-10-13 08:05:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:05:24,100 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 586 transitions. [2021-10-13 08:05:24,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:05:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 586 transitions. [2021-10-13 08:05:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-10-13 08:05:24,114 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:05:24,114 INFO L512 BasicCegarLoop]: trace histogram [168, 84, 28, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:05:24,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-13 08:05:24,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-13 08:05:24,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-10-13 08:05:24,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:05:24,735 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:05:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:05:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash -214211763, now seen corresponding path program 3 times [2021-10-13 08:05:24,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:05:24,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81043015] [2021-10-13 08:05:24,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:05:24,737 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:05:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:05:24,738 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:05:24,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 08:05:27,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-13 08:05:27,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:05:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:05:27,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:05:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21701 backedges. 39 proven. 732 refuted. 0 times theorem prover too weak. 20930 trivial. 0 not checked. [2021-10-13 08:05:31,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:05:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21701 backedges. 39 proven. 732 refuted. 0 times theorem prover too weak. 20930 trivial. 0 not checked. [2021-10-13 08:05:36,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:05:36,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81043015] [2021-10-13 08:05:36,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81043015] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:05:36,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598745028] [2021-10-13 08:05:36,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:05:36,710 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:05:36,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:05:36,711 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:05:36,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-13 08:06:42,833 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31) with exit command (exit)) stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() [2021-10-13 08:06:42,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 134 [2021-10-13 08:06:42,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-13 08:06:43,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:06:43,048 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.annotateAndAssertOutsideLoopFirst2(AnnotateAndAsserterWithStmtOrderPrioritization.java:277) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserterWithStmtOrderPrioritization.java:214) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:312) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) ... 32 more Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 40 more [2021-10-13 08:06:43,052 INFO L168 Benchmark]: Toolchain (without parser) took 138247.89 ms. Allocated memory was 62.9 MB in the beginning and 121.6 MB in the end (delta: 58.7 MB). Free memory was 42.2 MB in the beginning and 31.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 70.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:43,053 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 62.9 MB. Free memory is still 43.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:06:43,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.82 ms. Allocated memory is still 62.9 MB. Free memory was 42.0 MB in the beginning and 44.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:43,054 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.40 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 42.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:43,054 INFO L168 Benchmark]: Boogie Preprocessor took 32.90 ms. Allocated memory is still 62.9 MB. Free memory was 42.4 MB in the beginning and 41.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:06:43,054 INFO L168 Benchmark]: RCFGBuilder took 603.07 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 41.0 MB in the beginning and 63.5 MB in the end (delta: -22.5 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:43,055 INFO L168 Benchmark]: TraceAbstraction took 137289.62 ms. Allocated memory was 81.8 MB in the beginning and 121.6 MB in the end (delta: 39.8 MB). Free memory was 62.8 MB in the beginning and 31.5 MB in the end (delta: 31.3 MB). Peak memory consumption was 72.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:06:43,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 62.9 MB. Free memory is still 43.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.82 ms. Allocated memory is still 62.9 MB. Free memory was 42.0 MB in the beginning and 44.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.40 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 42.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.90 ms. Allocated memory is still 62.9 MB. Free memory was 42.4 MB in the beginning and 41.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 603.07 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 41.0 MB in the beginning and 63.5 MB in the end (delta: -22.5 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 137289.62 ms. Allocated memory was 81.8 MB in the beginning and 121.6 MB in the end (delta: 39.8 MB). Free memory was 62.8 MB in the beginning and 31.5 MB in the end (delta: 31.3 MB). Peak memory consumption was 72.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() : de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:06:43,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820ae0ce-c8f3-4d09-b00d-bb7c68154ba7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...