./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested-3.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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/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 ac430eaa5f6b4fef781eabca2fa59ab829e38729 ......................................................................................................................................................................................................................................................................................................................................................... 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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/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 ac430eaa5f6b4fef781eabca2fa59ab829e38729 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:08:26,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:08:26,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:08:26,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:08:26,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:08:26,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:08:26,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:08:26,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:08:26,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:08:26,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:08:26,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:08:26,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:08:26,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:08:26,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:08:26,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:08:26,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:08:26,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:08:26,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:08:26,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:08:26,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:08:26,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:08:26,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:08:26,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:08:26,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:08:26,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:08:26,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:08:26,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:08:26,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:08:26,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:08:26,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:08:26,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:08:26,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:08:26,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:08:26,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:08:26,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:08:26,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:08:26,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:08:26,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:08:26,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:08:26,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:08:26,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:08:26,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:08:26,617 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:08:26,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:08:26,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:08:26,620 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:08:26,620 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:08:26,620 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:08:26,621 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:08:26,621 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:08:26,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:08:26,629 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:08:26,630 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:08:26,630 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:08:26,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:08:26,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:08:26,631 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:08:26,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:08:26,633 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:08:26,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:08:26,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:08:26,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:08:26,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:08:26,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:08:26,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:08:26,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:08:26,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:08:26,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:08:26,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:08:26,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:08:26,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:08:26,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:08:26,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:26,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:08:26,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:08:26,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:08:26,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:08:26,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:08:26,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:08:26,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:08:26,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:08:26,642 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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac430eaa5f6b4fef781eabca2fa59ab829e38729 [2021-10-13 07:08:26,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:08:26,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:08:26,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:08:26,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:08:26,967 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:08:26,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-13 07:08:27,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data/723868340/2493494e39ff46a5b99a2f8883b01bb4/FLAGcbafb38d4 [2021-10-13 07:08:27,624 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:08:27,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-13 07:08:27,630 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data/723868340/2493494e39ff46a5b99a2f8883b01bb4/FLAGcbafb38d4 [2021-10-13 07:08:27,991 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data/723868340/2493494e39ff46a5b99a2f8883b01bb4 [2021-10-13 07:08:27,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:08:27,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:08:27,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:27,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:08:28,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:08:28,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:27" (1/1) ... [2021-10-13 07:08:28,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7524b0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28, skipping insertion in model container [2021-10-13 07:08:28,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:27" (1/1) ... [2021-10-13 07:08:28,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:08:28,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:08:28,219 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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-13 07:08:28,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:28,244 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:08:28,258 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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-13 07:08:28,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:28,278 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:08:28,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28 WrapperNode [2021-10-13 07:08:28,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:28,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:28,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:08:28,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:08:28,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:28,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:08:28,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:08:28,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:08:28,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:08:28,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:08:28,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:08:28,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:08:28,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (1/1) ... [2021-10-13 07:08:28,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:28,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:28,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:08:28,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:08:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:08:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:08:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:08:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:08:28,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:08:28,892 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:08:28,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:28 BoogieIcfgContainer [2021-10-13 07:08:28,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:08:28,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:08:28,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:08:28,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:08:28,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:08:27" (1/3) ... [2021-10-13 07:08:28,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c780b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:28, skipping insertion in model container [2021-10-13 07:08:28,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:28" (2/3) ... [2021-10-13 07:08:28,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c780b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:28, skipping insertion in model container [2021-10-13 07:08:28,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:28" (3/3) ... [2021-10-13 07:08:28,915 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2021-10-13 07:08:28,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:08:28,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:08:28,971 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:08:28,980 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 07:08:28,981 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:08:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 07:08:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:08:29,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:29,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:08:29,005 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash 82586899, now seen corresponding path program 1 times [2021-10-13 07:08:29,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:08:29,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715808000] [2021-10-13 07:08:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:29,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:08:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:29,324 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 07:08:29,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:08:29,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715808000] [2021-10-13 07:08:29,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715808000] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:29,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:29,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:08:29,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210678278] [2021-10-13 07:08:29,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:08:29,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:08:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:08:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:29,360 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:29,410 INFO L93 Difference]: Finished difference Result 14 states and 21 transitions. [2021-10-13 07:08:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:08:29,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:08:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:29,423 INFO L225 Difference]: With dead ends: 14 [2021-10-13 07:08:29,423 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 07:08:29,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:08:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 07:08:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2021-10-13 07:08:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-10-13 07:08:29,460 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2021-10-13 07:08:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:29,461 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-13 07:08:29,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2021-10-13 07:08:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:08:29,463 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:29,463 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:08:29,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:08:29,464 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:29,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:29,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1734662927, now seen corresponding path program 1 times [2021-10-13 07:08:29,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:08:29,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129031676] [2021-10-13 07:08:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:29,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:08:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:29,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:08:29,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129031676] [2021-10-13 07:08:29,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129031676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:08:29,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429985948] [2021-10-13 07:08:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:29,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:29,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:29,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:08:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:08:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:29,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:29,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429985948] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:29,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1413205563] [2021-10-13 07:08:29,724 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-13 07:08:29,725 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:08:29,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:08:29,735 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:08:29,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:08:29,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:29,773 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:29,774 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:29,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:08:29,779 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:08:29,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:29,781 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:08:29,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-13 07:08:29,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:29,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:29,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:29,896 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 07:08:29,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 07:08:29,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:29,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:08:29,903 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:29,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:08:29,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:08:29,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:08:29,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:29,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:29,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-10-13 07:08:29,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:08:29,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:136, output treesize:120 [2021-10-13 07:08:29,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:30,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:30,169 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_9| 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 07:08:30,173 INFO L168 Benchmark]: Toolchain (without parser) took 2176.66 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 64.8 MB in the beginning and 66.3 MB in the end (delta: -1.5 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:30,174 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:08:30,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.24 ms. Allocated memory is still 98.6 MB. Free memory was 64.6 MB in the beginning and 73.1 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:30,175 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.95 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 71.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:30,176 INFO L168 Benchmark]: Boogie Preprocessor took 47.11 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 70.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:30,177 INFO L168 Benchmark]: RCFGBuilder took 524.49 ms. Allocated memory is still 98.6 MB. Free memory was 70.5 MB in the beginning and 57.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:30,177 INFO L168 Benchmark]: TraceAbstraction took 1274.22 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 57.3 MB in the beginning and 66.3 MB in the end (delta: -8.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:08:30,181 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.24 ms. Allocated memory is still 98.6 MB. Free memory was 64.6 MB in the beginning and 73.1 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.95 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 71.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.11 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 70.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 524.49 ms. Allocated memory is still 98.6 MB. Free memory was 70.5 MB in the beginning and 57.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1274.22 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 57.3 MB in the beginning and 66.3 MB in the end (delta: -8.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_9| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_9|: 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 07:08:30,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/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 07:08:32,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:08:32,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:08:32,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:08:32,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:08:32,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:08:32,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:08:32,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:08:32,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:08:32,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:08:32,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:08:32,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:08:32,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:08:32,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:08:32,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:08:32,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:08:32,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:08:32,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:08:32,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:08:32,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:08:32,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:08:32,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:08:32,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:08:32,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:08:33,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:08:33,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:08:33,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:08:33,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:08:33,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:08:33,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:08:33,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:08:33,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:08:33,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:08:33,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:08:33,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:08:33,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:08:33,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:08:33,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:08:33,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:08:33,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:08:33,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:08:33,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:08:33,091 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:08:33,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:08:33,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:08:33,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:08:33,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:08:33,096 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:08:33,096 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:08:33,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:08:33,097 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:08:33,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:08:33,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:08:33,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:08:33,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:08:33,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:08:33,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:08:33,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:08:33,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:08:33,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:08:33,102 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:08:33,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:08:33,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:08:33,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:08:33,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:08:33,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:08:33,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:08:33,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:08:33,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:33,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:08:33,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:08:33,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:08:33,106 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:08:33,106 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:33,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:08:33,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:08:33,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:08:33,107 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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac430eaa5f6b4fef781eabca2fa59ab829e38729 [2021-10-13 07:08:33,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:08:33,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:08:33,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:08:33,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:08:33,530 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:08:33,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-13 07:08:33,603 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data/65be21aae/c74e9b371da4441abb9ea87528702106/FLAGf66137c23 [2021-10-13 07:08:34,244 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:08:34,245 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-13 07:08:34,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data/65be21aae/c74e9b371da4441abb9ea87528702106/FLAGf66137c23 [2021-10-13 07:08:34,592 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/data/65be21aae/c74e9b371da4441abb9ea87528702106 [2021-10-13 07:08:34,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:08:34,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:08:34,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:34,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:08:34,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:08:34,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65e0d5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34, skipping insertion in model container [2021-10-13 07:08:34,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:08:34,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:08:34,767 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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-13 07:08:34,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:34,812 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:08:34,852 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_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-13 07:08:34,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:34,879 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:08:34,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34 WrapperNode [2021-10-13 07:08:34,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:34,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:34,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:08:34,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:08:34,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:34,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:08:34,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:08:34,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:08:34,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:08:34,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:08:34,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:08:34,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:08:34,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (1/1) ... [2021-10-13 07:08:34,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:35,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:08:35,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:08:35,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:08:35,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:08:35,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:08:35,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:08:35,326 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:08:35,326 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:08:35,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:35 BoogieIcfgContainer [2021-10-13 07:08:35,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:08:35,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:08:35,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:08:35,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:08:35,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:08:34" (1/3) ... [2021-10-13 07:08:35,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e4702f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:35, skipping insertion in model container [2021-10-13 07:08:35,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:34" (2/3) ... [2021-10-13 07:08:35,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e4702f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:35, skipping insertion in model container [2021-10-13 07:08:35,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:35" (3/3) ... [2021-10-13 07:08:35,336 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2021-10-13 07:08:35,342 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:08:35,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:08:35,392 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:08:35,400 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 07:08:35,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:08:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:08:35,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:35,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:35,423 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2021-10-13 07:08:35,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:35,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788826087] [2021-10-13 07:08:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:35,445 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:35,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:35,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:08:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:35,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:08:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:35,637 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 07:08:35,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:35,683 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 07:08:35,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:35,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788826087] [2021-10-13 07:08:35,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788826087] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:35,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:35,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:08:35,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755971154] [2021-10-13 07:08:35,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:08:35,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:08:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:08:35,718 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:35,811 INFO L93 Difference]: Finished difference Result 30 states and 52 transitions. [2021-10-13 07:08:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:08:35,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:08:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:35,822 INFO L225 Difference]: With dead ends: 30 [2021-10-13 07:08:35,822 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 07:08:35,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:08:35,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 07:08:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-13 07:08:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-10-13 07:08:35,858 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 9 [2021-10-13 07:08:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:35,859 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-10-13 07:08:35,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-10-13 07:08:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:08:35,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:35,860 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:35,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:36,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:08:36,072 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2128752989, now seen corresponding path program 1 times [2021-10-13 07:08:36,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:36,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383403522] [2021-10-13 07:08:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:36,076 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:36,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:36,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:36,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:08:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:08:36,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:36,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:36,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:36,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383403522] [2021-10-13 07:08:36,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383403522] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:08:36,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:08:36,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-13 07:08:36,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052227128] [2021-10-13 07:08:36,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:08:36,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:08:36,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:08:36,423 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:36,552 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2021-10-13 07:08:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:08:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 07:08:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:36,557 INFO L225 Difference]: With dead ends: 53 [2021-10-13 07:08:36,558 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 07:08:36,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:08:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 07:08:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2021-10-13 07:08:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 07:08:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-10-13 07:08:36,565 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 15 [2021-10-13 07:08:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:36,565 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-10-13 07:08:36,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-10-13 07:08:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:08:36,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:36,567 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:36,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:36,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:08:36,779 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1319465945, now seen corresponding path program 1 times [2021-10-13 07:08:36,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:36,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459355757] [2021-10-13 07:08:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:36,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:36,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:36,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:36,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:08:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:36,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:08:36,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:36,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:37,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:37,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459355757] [2021-10-13 07:08:37,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459355757] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:37,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1739143031] [2021-10-13 07:08:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:37,084 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:37,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:37,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:37,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:08:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:37,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:08:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:37,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:37,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1739143031] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:37,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571037915] [2021-10-13 07:08:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:37,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:37,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:37,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:37,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:08:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:37,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:08:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:37,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:37,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571037915] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:37,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:08:37,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 6, 5] total 14 [2021-10-13 07:08:37,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789354016] [2021-10-13 07:08:37,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:08:37,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:08:37,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:08:37,776 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:38,820 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2021-10-13 07:08:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 07:08:38,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 07:08:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:38,822 INFO L225 Difference]: With dead ends: 98 [2021-10-13 07:08:38,822 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 07:08:38,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 811.2ms TimeCoverageRelationStatistics Valid=321, Invalid=1011, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 07:08:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 07:08:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2021-10-13 07:08:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 07:08:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-10-13 07:08:38,844 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 15 [2021-10-13 07:08:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:38,845 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-10-13 07:08:38,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-10-13 07:08:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 07:08:38,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:38,847 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:38,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:39,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:39,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-13 07:08:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:39,464 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:39,464 INFO L82 PathProgramCache]: Analyzing trace with hash -820883237, now seen corresponding path program 2 times [2021-10-13 07:08:39,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:39,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470623909] [2021-10-13 07:08:39,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:08:39,465 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:39,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:39,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:39,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:08:39,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:08:39,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:39,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:08:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 07:08:39,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 07:08:39,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:39,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470623909] [2021-10-13 07:08:39,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470623909] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:39,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [301463570] [2021-10-13 07:08:39,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:08:39,845 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:39,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:39,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:39,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:08:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:08:40,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:08:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:40,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:40,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [301463570] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:40,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831109338] [2021-10-13 07:08:40,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:08:40,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:40,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:40,562 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:40,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:08:40,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:08:40,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:40,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:08:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:40,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:40,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831109338] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:40,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:08:40,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9, 8, 9, 8] total 20 [2021-10-13 07:08:40,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745701592] [2021-10-13 07:08:40,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 07:08:40,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 07:08:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:08:40,990 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:43,484 INFO L93 Difference]: Finished difference Result 329 states and 413 transitions. [2021-10-13 07:08:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 07:08:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 07:08:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:43,488 INFO L225 Difference]: With dead ends: 329 [2021-10-13 07:08:43,488 INFO L226 Difference]: Without dead ends: 278 [2021-10-13 07:08:43,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1512.8ms TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 07:08:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-13 07:08:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 171. [2021-10-13 07:08:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.223529411764706) internal successors, (208), 170 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 07:08:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 208 transitions. [2021-10-13 07:08:43,518 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 208 transitions. Word has length 27 [2021-10-13 07:08:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:43,519 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 208 transitions. [2021-10-13 07:08:43,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 208 transitions. [2021-10-13 07:08:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 07:08:43,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:43,521 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:43,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:43,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:43,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:44,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:44,134 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:44,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1628382821, now seen corresponding path program 1 times [2021-10-13 07:08:44,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:44,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282721866] [2021-10-13 07:08:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:44,135 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:44,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:44,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:44,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:08:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:44,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:08:44,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:44,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:44,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:44,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282721866] [2021-10-13 07:08:44,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282721866] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:44,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051030551] [2021-10-13 07:08:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:44,696 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:44,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:44,697 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:44,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:08:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:44,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:08:44,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:44,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:45,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2051030551] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:45,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889293878] [2021-10-13 07:08:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:45,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:45,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:45,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:45,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:08:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:45,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:08:45,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:45,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:45,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889293878] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:45,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:08:45,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-10-13 07:08:45,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18535464] [2021-10-13 07:08:45,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:08:45,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:45,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:08:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:08:45,447 INFO L87 Difference]: Start difference. First operand 171 states and 208 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:46,034 INFO L93 Difference]: Finished difference Result 663 states and 857 transitions. [2021-10-13 07:08:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 07:08:46,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 07:08:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:46,041 INFO L225 Difference]: With dead ends: 663 [2021-10-13 07:08:46,041 INFO L226 Difference]: Without dead ends: 494 [2021-10-13 07:08:46,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:08:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-10-13 07:08:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 491. [2021-10-13 07:08:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1122448979591837) internal successors, (545), 490 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 07:08:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2021-10-13 07:08:46,150 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 27 [2021-10-13 07:08:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:46,151 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2021-10-13 07:08:46,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:08:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2021-10-13 07:08:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 07:08:46,157 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:46,158 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:46,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:46,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:46,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:46,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:46,769 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:46,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1844111131, now seen corresponding path program 2 times [2021-10-13 07:08:46,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:46,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651855522] [2021-10-13 07:08:46,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:08:46,770 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:46,773 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:46,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:08:46,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:08:46,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:46,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:08:46,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:47,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:48,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:48,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651855522] [2021-10-13 07:08:48,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651855522] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:48,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1243025828] [2021-10-13 07:08:48,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:08:48,173 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:48,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:48,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 07:08:48,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:08:48,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:48,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:08:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:48,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:48,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1243025828] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:48,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516042798] [2021-10-13 07:08:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:08:48,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:48,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:48,878 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:48,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 07:08:49,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:08:49,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:49,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:08:49,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:49,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:49,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516042798] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:49,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:08:49,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2021-10-13 07:08:49,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320021334] [2021-10-13 07:08:49,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 07:08:49,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 07:08:49,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 07:08:49,501 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 07:08:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:52,365 INFO L93 Difference]: Finished difference Result 1990 states and 2411 transitions. [2021-10-13 07:08:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 07:08:52,366 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 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 51 [2021-10-13 07:08:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:52,374 INFO L225 Difference]: With dead ends: 1990 [2021-10-13 07:08:52,375 INFO L226 Difference]: Without dead ends: 1501 [2021-10-13 07:08:52,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2827.9ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 07:08:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-10-13 07:08:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1460. [2021-10-13 07:08:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 1.0705962988348183) internal successors, (1562), 1459 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states 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 07:08:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 1562 transitions. [2021-10-13 07:08:52,487 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 1562 transitions. Word has length 51 [2021-10-13 07:08:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:52,487 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 1562 transitions. [2021-10-13 07:08:52,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 07:08:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 1562 transitions. [2021-10-13 07:08:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-13 07:08:52,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:52,497 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 27, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:52,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:52,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-13 07:08:52,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-10-13 07:08:53,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:53,109 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:53,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:53,109 INFO L82 PathProgramCache]: Analyzing trace with hash 968799767, now seen corresponding path program 3 times [2021-10-13 07:08:53,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:53,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98943948] [2021-10-13 07:08:53,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:08:53,110 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:53,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:53,111 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:53,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:08:53,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:08:53,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:08:53,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-10-13 07:08:54,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-10-13 07:08:54,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:54,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98943948] [2021-10-13 07:08:54,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98943948] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:08:54,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:08:54,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-10-13 07:08:54,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838596821] [2021-10-13 07:08:54,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:08:54,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:54,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:08:54,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:08:54,745 INFO L87 Difference]: Start difference. First operand 1460 states and 1562 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 07:08:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:55,145 INFO L93 Difference]: Finished difference Result 4272 states and 4569 transitions. [2021-10-13 07:08:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:08:55,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 99 [2021-10-13 07:08:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:55,172 INFO L225 Difference]: With dead ends: 4272 [2021-10-13 07:08:55,173 INFO L226 Difference]: Without dead ends: 4270 [2021-10-13 07:08:55,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:08:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2021-10-13 07:08:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 2817. [2021-10-13 07:08:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 1.0696022727272727) internal successors, (3012), 2816 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 07:08:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 3012 transitions. [2021-10-13 07:08:55,430 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 3012 transitions. Word has length 99 [2021-10-13 07:08:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:55,432 INFO L470 AbstractCegarLoop]: Abstraction has 2817 states and 3012 transitions. [2021-10-13 07:08:55,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 07:08:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 3012 transitions. [2021-10-13 07:08:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-13 07:08:55,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:55,438 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:55,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:55,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:08:55,651 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:55,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1205348839, now seen corresponding path program 1 times [2021-10-13 07:08:55,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:55,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259306650] [2021-10-13 07:08:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:55,653 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:55,654 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:55,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:08:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:56,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:08:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 521 proven. 77 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-13 07:08:56,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 551 proven. 45 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2021-10-13 07:08:56,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:56,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259306650] [2021-10-13 07:08:56,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259306650] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:56,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [370218160] [2021-10-13 07:08:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:56,871 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:56,874 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:56,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 07:08:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:57,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:08:57,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 521 proven. 77 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-13 07:08:57,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 551 proven. 45 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2021-10-13 07:08:58,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [370218160] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:58,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869398968] [2021-10-13 07:08:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:58,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:58,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:58,022 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:58,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 07:08:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 07:08:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:59,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:09:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 143 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:09:01,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869398968] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:09:01,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:09:01,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 34, 32] total 64 [2021-10-13 07:09:01,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122532412] [2021-10-13 07:09:01,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-10-13 07:09:01,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:09:01,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-10-13 07:09:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 07:09:01,756 INFO L87 Difference]: Start difference. First operand 2817 states and 3012 transitions. Second operand has 64 states, 64 states have (on average 3.171875) internal successors, (203), 64 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 07:09:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:09:27,584 INFO L93 Difference]: Finished difference Result 7961 states and 9491 transitions. [2021-10-13 07:09:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-13 07:09:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.171875) internal successors, (203), 64 states have internal predecessors, (203), 0 states have call successors, (0), 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 99 [2021-10-13 07:09:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:09:27,613 INFO L225 Difference]: With dead ends: 7961 [2021-10-13 07:09:27,613 INFO L226 Difference]: Without dead ends: 5380 [2021-10-13 07:09:27,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 553 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 18287.0ms TimeCoverageRelationStatistics Valid=2958, Invalid=6548, Unknown=0, NotChecked=0, Total=9506 [2021-10-13 07:09:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2021-10-13 07:09:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 4521. [2021-10-13 07:09:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 1.0606194690265487) internal successors, (4794), 4520 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states 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 07:09:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 4794 transitions. [2021-10-13 07:09:28,393 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 4794 transitions. Word has length 99 [2021-10-13 07:09:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:09:28,394 INFO L470 AbstractCegarLoop]: Abstraction has 4521 states and 4794 transitions. [2021-10-13 07:09:28,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.171875) internal successors, (203), 64 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 07:09:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 4794 transitions. [2021-10-13 07:09:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-13 07:09:28,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:09:28,399 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:09:28,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:09:28,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-13 07:09:28,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-10-13 07:09:29,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:09:29,014 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:09:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:09:29,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1882946013, now seen corresponding path program 3 times [2021-10-13 07:09:29,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:09:29,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177927182] [2021-10-13 07:09:29,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:09:29,015 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:09:29,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:09:29,017 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:09:29,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:09:29,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:09:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:09:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:09:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:09:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-10-13 07:09:30,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:09:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2021-10-13 07:09:30,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:09:30,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177927182] [2021-10-13 07:09:30,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177927182] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:09:30,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:09:30,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-10-13 07:09:30,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726065387] [2021-10-13 07:09:30,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:09:30,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:09:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:09:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:09:30,704 INFO L87 Difference]: Start difference. First operand 4521 states and 4794 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 07:09:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:09:31,473 INFO L93 Difference]: Finished difference Result 6186 states and 6582 transitions. [2021-10-13 07:09:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:09:31,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 99 [2021-10-13 07:09:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:09:31,503 INFO L225 Difference]: With dead ends: 6186 [2021-10-13 07:09:31,503 INFO L226 Difference]: Without dead ends: 6184 [2021-10-13 07:09:31,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:09:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6184 states. [2021-10-13 07:09:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6184 to 4521. [2021-10-13 07:09:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 1.0606194690265487) internal successors, (4794), 4520 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states 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 07:09:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 4794 transitions. [2021-10-13 07:09:32,221 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 4794 transitions. Word has length 99 [2021-10-13 07:09:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:09:32,222 INFO L470 AbstractCegarLoop]: Abstraction has 4521 states and 4794 transitions. [2021-10-13 07:09:32,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 07:09:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 4794 transitions. [2021-10-13 07:09:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-13 07:09:32,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:09:32,227 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:09:32,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:09:32,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:09:32,439 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:09:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:09:32,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1075386847, now seen corresponding path program 1 times [2021-10-13 07:09:32,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:09:32,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336024303] [2021-10-13 07:09:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:09:32,440 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:09:32,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:09:32,442 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:09:32,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 07:09:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:09:33,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:09:33,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:09:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:09:33,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:09:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:09:36,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:09:36,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336024303] [2021-10-13 07:09:36,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336024303] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:09:36,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [834551562] [2021-10-13 07:09:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:09:36,554 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:09:36,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:09:36,554 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:09:36,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 07:09:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:09:37,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:09:37,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:09:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-10-13 07:09:37,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:09:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-10-13 07:09:37,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [834551562] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:09:37,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:09:37,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [33, 33] total 66 [2021-10-13 07:09:37,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241667251] [2021-10-13 07:09:37,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:09:37,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:09:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:09:37,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2021-10-13 07:09:37,987 INFO L87 Difference]: Start difference. First operand 4521 states and 4794 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 07:09:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:09:38,464 INFO L93 Difference]: Finished difference Result 7406 states and 7841 transitions. [2021-10-13 07:09:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:09:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 99 [2021-10-13 07:09:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:09:38,485 INFO L225 Difference]: With dead ends: 7406 [2021-10-13 07:09:38,485 INFO L226 Difference]: Without dead ends: 4546 [2021-10-13 07:09:38,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2914.6ms TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2021-10-13 07:09:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2021-10-13 07:09:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4530. [2021-10-13 07:09:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4529 states have (on average 1.061823802163833) internal successors, (4809), 4529 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states 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 07:09:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 4809 transitions. [2021-10-13 07:09:38,978 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 4809 transitions. Word has length 99 [2021-10-13 07:09:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:09:38,978 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 4809 transitions. [2021-10-13 07:09:38,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 07:09:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 4809 transitions. [2021-10-13 07:09:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-13 07:09:38,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:09:38,983 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:09:39,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-10-13 07:09:39,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:09:39,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:09:39,387 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:09:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:09:39,387 INFO L82 PathProgramCache]: Analyzing trace with hash 77094717, now seen corresponding path program 2 times [2021-10-13 07:09:39,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:09:39,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5420469] [2021-10-13 07:09:39,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:09:39,388 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:09:39,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:09:39,389 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:09:39,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 07:09:40,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:09:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:09:40,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:09:40,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:09:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-10-13 07:09:40,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:09:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-10-13 07:09:40,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:09:40,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5420469] [2021-10-13 07:09:40,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5420469] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:09:40,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [170745540] [2021-10-13 07:09:40,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:09:40,710 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:09:40,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:09:40,714 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:09:40,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 07:09:41,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:09:41,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:09:41,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 07:09:41,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:09:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:09:43,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:09:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 237 proven. 1276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 07:09:45,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [170745540] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:09:45,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192507766] [2021-10-13 07:09:45,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:09:45,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:09:45,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:09:45,266 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:09:45,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 07:09:46,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:09:46,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:09:46,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:09:46,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:09:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-10-13 07:09:46,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:09:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 210 proven. 29 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2021-10-13 07:09:46,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192507766] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:09:46,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:09:46,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 36, 33, 7, 5] total 73 [2021-10-13 07:09:46,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264417592] [2021-10-13 07:09:46,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-13 07:09:46,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:09:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-13 07:09:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=3954, Unknown=0, NotChecked=0, Total=5256 [2021-10-13 07:09:46,696 INFO L87 Difference]: Start difference. First operand 4530 states and 4809 transitions. Second operand has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 73 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 07:10:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:10:32,088 INFO L93 Difference]: Finished difference Result 9368 states and 10343 transitions. [2021-10-13 07:10:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-10-13 07:10:32,088 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 73 states have internal predecessors, (222), 0 states have call successors, (0), 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 105 [2021-10-13 07:10:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:10:32,111 INFO L225 Difference]: With dead ends: 9368 [2021-10-13 07:10:32,111 INFO L226 Difference]: Without dead ends: 6215 [2021-10-13 07:10:32,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19068 ImplicationChecksByTransitivity, 38261.5ms TimeCoverageRelationStatistics Valid=13557, Invalid=38199, Unknown=0, NotChecked=0, Total=51756 [2021-10-13 07:10:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6215 states. [2021-10-13 07:10:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6215 to 4674. [2021-10-13 07:10:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 1.0716884228546972) internal successors, (5008), 4673 states have internal predecessors, (5008), 0 states have call successors, (0), 0 states 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 07:10:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 5008 transitions. [2021-10-13 07:10:32,678 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 5008 transitions. Word has length 105 [2021-10-13 07:10:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:10:32,678 INFO L470 AbstractCegarLoop]: Abstraction has 4674 states and 5008 transitions. [2021-10-13 07:10:32,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 73 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 07:10:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 5008 transitions. [2021-10-13 07:10:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-10-13 07:10:32,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:10:32,691 INFO L512 BasicCegarLoop]: trace histogram [60, 60, 58, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:10:32,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-13 07:10:32,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:33,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:10:33,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:10:33,323 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:10:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:10:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1848907781, now seen corresponding path program 1 times [2021-10-13 07:10:33,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:10:33,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648153053] [2021-10-13 07:10:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:10:33,324 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:10:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:10:33,325 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:10:33,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 07:10:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:10:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:10:34,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:10:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2762 proven. 1335 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-10-13 07:10:34,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:10:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2762 proven. 1335 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-10-13 07:10:37,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:10:37,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648153053] [2021-10-13 07:10:37,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648153053] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:10:37,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [61039410] [2021-10-13 07:10:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:10:37,895 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:10:37,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:10:37,896 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:10:37,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 07:10:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:10:39,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:10:39,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:10:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2762 proven. 1335 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-10-13 07:10:39,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:10:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2762 proven. 1335 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-10-13 07:10:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [61039410] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:10:40,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186603481] [2021-10-13 07:10:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:10:40,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:10:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:10:40,175 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:10:40,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 07:10:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:10:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 07:10:41,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:10:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2766 proven. 1335 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-10-13 07:10:41,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:10:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5436 backedges. 2766 proven. 1335 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-10-13 07:10:44,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186603481] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:10:44,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:10:44,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 34, 34] total 96 [2021-10-13 07:10:44,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423833895] [2021-10-13 07:10:44,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-13 07:10:44,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:10:44,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-13 07:10:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2607, Invalid=6513, Unknown=0, NotChecked=0, Total=9120 [2021-10-13 07:10:44,294 INFO L87 Difference]: Start difference. First operand 4674 states and 5008 transitions. Second operand has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 07:11:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:11:04,080 INFO L93 Difference]: Finished difference Result 19820 states and 24249 transitions. [2021-10-13 07:11:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-13 07:11:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 0 states have call successors, (0), 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 195 [2021-10-13 07:11:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:11:04,112 INFO L225 Difference]: With dead ends: 19820 [2021-10-13 07:11:04,112 INFO L226 Difference]: Without dead ends: 16902 [2021-10-13 07:11:04,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1196 GetRequests, 1070 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 21213.4ms TimeCoverageRelationStatistics Valid=5121, Invalid=11135, Unknown=0, NotChecked=0, Total=16256 [2021-10-13 07:11:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16902 states. [2021-10-13 07:11:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16902 to 16822. [2021-10-13 07:11:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16822 states, 16821 states have (on average 1.0291897033470068) internal successors, (17312), 16821 states have internal predecessors, (17312), 0 states have call successors, (0), 0 states 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 07:11:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16822 states to 16822 states and 17312 transitions. [2021-10-13 07:11:05,821 INFO L78 Accepts]: Start accepts. Automaton has 16822 states and 17312 transitions. Word has length 195 [2021-10-13 07:11:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:11:05,821 INFO L470 AbstractCegarLoop]: Abstraction has 16822 states and 17312 transitions. [2021-10-13 07:11:05,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 07:11:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 16822 states and 17312 transitions. [2021-10-13 07:11:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-10-13 07:11:05,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:11:05,860 INFO L512 BasicCegarLoop]: trace histogram [124, 124, 120, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:11:05,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-13 07:11:06,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:11:06,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 07:11:06,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:11:06,466 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:11:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:11:06,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2000573559, now seen corresponding path program 2 times [2021-10-13 07:11:06,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:11:06,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133641048] [2021-10-13 07:11:06,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:11:06,469 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:11:06,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:11:06,470 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:11:06,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 07:11:07,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:11:07,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:11:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 07:11:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:11:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8836 proven. 1457 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-13 07:11:09,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:11:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8898 proven. 1395 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-13 07:11:13,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:11:13,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133641048] [2021-10-13 07:11:13,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133641048] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:11:13,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1360063607] [2021-10-13 07:11:13,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:11:13,338 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:11:13,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:11:13,361 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:11:13,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 07:11:15,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:11:15,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:11:15,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 07:11:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:11:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8836 proven. 1457 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-13 07:11:16,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:11:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8898 proven. 1395 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-13 07:11:17,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1360063607] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:11:17,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772333985] [2021-10-13 07:11:17,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:11:17,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:11:17,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:11:17,202 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:11:17,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 07:11:18,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:11:18,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:11:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 07:11:18,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:11:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8836 proven. 1457 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-13 07:11:20,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:11:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 8898 proven. 1395 refuted. 0 times theorem prover too weak. 12839 trivial. 0 not checked. [2021-10-13 07:11:21,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772333985] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:11:21,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:11:21,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35, 34, 35, 34] total 67 [2021-10-13 07:11:21,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436235260] [2021-10-13 07:11:21,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-10-13 07:11:21,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:11:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-10-13 07:11:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2021-10-13 07:11:21,295 INFO L87 Difference]: Start difference. First operand 16822 states and 17312 transitions. Second operand has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 07:11:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:11:48,011 INFO L93 Difference]: Finished difference Result 28528 states and 29543 transitions. [2021-10-13 07:11:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-13 07:11:48,015 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 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 387 [2021-10-13 07:11:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:11:48,044 INFO L225 Difference]: With dead ends: 28528 [2021-10-13 07:11:48,044 INFO L226 Difference]: Without dead ends: 15398 [2021-10-13 07:11:48,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2380 GetRequests, 2276 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 22405.4ms TimeCoverageRelationStatistics Valid=3240, Invalid=6660, Unknown=0, NotChecked=0, Total=9900 [2021-10-13 07:11:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15398 states. [2021-10-13 07:11:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15398 to 14436. [2021-10-13 07:11:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14436 states, 14435 states have (on average 1.0302736404572221) internal successors, (14872), 14435 states have internal predecessors, (14872), 0 states have call successors, (0), 0 states 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 07:11:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14436 states to 14436 states and 14872 transitions. [2021-10-13 07:11:49,550 INFO L78 Accepts]: Start accepts. Automaton has 14436 states and 14872 transitions. Word has length 387 [2021-10-13 07:11:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:11:49,551 INFO L470 AbstractCegarLoop]: Abstraction has 14436 states and 14872 transitions. [2021-10-13 07:11:49,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 07:11:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 14436 states and 14872 transitions. [2021-10-13 07:11:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-10-13 07:11:49,584 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:11:49,584 INFO L512 BasicCegarLoop]: trace histogram [124, 124, 122, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:11:49,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 07:11:49,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-13 07:11:50,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-13 07:11:50,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:11:50,198 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:11:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:11:50,198 INFO L82 PathProgramCache]: Analyzing trace with hash -556004347, now seen corresponding path program 3 times [2021-10-13 07:11:50,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:11:50,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095177122] [2021-10-13 07:11:50,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:11:50,199 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:11:50,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:11:50,200 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:11:50,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 07:11:51,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:11:51,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:11:51,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:11:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:11:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 11845 proven. 1 refuted. 0 times theorem prover too weak. 11286 trivial. 0 not checked. [2021-10-13 07:11:52,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:11:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 11661 proven. 185 refuted. 0 times theorem prover too weak. 11286 trivial. 0 not checked. [2021-10-13 07:11:53,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:11:53,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095177122] [2021-10-13 07:11:53,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095177122] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:11:53,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366846989] [2021-10-13 07:11:53,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:11:53,941 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:11:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:11:53,942 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:11:53,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-13 07:11:56,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:11:56,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:11:56,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:11:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:11:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 184 proven. 11662 refuted. 0 times theorem prover too weak. 11286 trivial. 0 not checked. [2021-10-13 07:11:59,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:12:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 3 proven. 496 refuted. 0 times theorem prover too weak. 22633 trivial. 0 not checked. [2021-10-13 07:12:00,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1366846989] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:12:00,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895095656] [2021-10-13 07:12:00,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:12:00,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:12:00,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:12:00,516 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:12:00,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 07:12:03,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:12:03,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:12:03,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:12:03,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:12:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 182 proven. 11785 refuted. 0 times theorem prover too weak. 11165 trivial. 0 not checked. [2021-10-13 07:12:07,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:12:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 23132 backedges. 11661 proven. 306 refuted. 0 times theorem prover too weak. 11165 trivial. 0 not checked. [2021-10-13 07:12:16,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895095656] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:12:16,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:12:16,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 13, 11] total 31 [2021-10-13 07:12:16,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020467356] [2021-10-13 07:12:16,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 07:12:16,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:12:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 07:12:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2021-10-13 07:12:16,523 INFO L87 Difference]: Start difference. First operand 14436 states and 14872 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:12:20,060 INFO L93 Difference]: Finished difference Result 23696 states and 24383 transitions. [2021-10-13 07:12:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 07:12:20,061 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 387 [2021-10-13 07:12:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:12:20,061 INFO L225 Difference]: With dead ends: 23696 [2021-10-13 07:12:20,061 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:12:20,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2339 GetRequests, 2288 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1834.8ms TimeCoverageRelationStatistics Valid=606, Invalid=1844, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 07:12:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:12:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:12:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:12:20,075 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 387 [2021-10-13 07:12:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:12:20,076 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:12:20,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:12:20,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:12:20,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:12:20,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:20,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:20,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:20,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:12:20,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:12:20,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:12:25,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:18:17,280 WARN L207 SmtUtils]: Spent 5.87 m on a formula simplification. DAG size of input: 11673 DAG size of output: 861 [2021-10-13 07:18:38,578 WARN L207 SmtUtils]: Spent 18.80 s on a formula simplification. DAG size of input: 804 DAG size of output: 24 [2021-10-13 07:18:38,581 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2021-10-13 07:18:38,581 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 24) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~st~0 (_ bv1 32))) (.cse3 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (.cse4 (bvslt ~last~0 (_ bv200000 32))) (.cse1 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) (.cse2 (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv200000 32)))) (or (and (= ULTIMATE.start_main_~b~0 (_ bv0 32)) .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse1 .cse2) (and .cse4 .cse3 .cse1 .cse2) (and .cse4 (= ULTIMATE.start_main_~a~0 (_ bv0 32)) .cse1 .cse2))) [2021-10-13 07:18:38,582 INFO L857 garLoopResultBuilder]: For program point L23-4(lines 21 31) no Hoare annotation was computed. [2021-10-13 07:18:38,582 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:18:38,582 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:18:38,582 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:18:38,582 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2021-10-13 07:18:38,582 INFO L857 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-13 07:18:38,583 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-13 07:18:38,583 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 14) no Hoare annotation was computed. [2021-10-13 07:18:38,583 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 11 31) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0))) (or (and (not (bvslt ULTIMATE.start_main_~c~0 (_ bv200000 32))) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) .cse0 (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv200000 32))) (and (= ULTIMATE.start_main_~a~0 (_ bv0 32)) .cse0 (= ULTIMATE.start_main_~c~0 (_ bv0 32))))) [2021-10-13 07:18:38,583 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:18:38,583 INFO L857 garLoopResultBuilder]: For program point L25-1(lines 21 31) no Hoare annotation was computed. [2021-10-13 07:18:38,584 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-10-13 07:18:38,584 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 32) no Hoare annotation was computed. [2021-10-13 07:18:38,588 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:18:38,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:18:38 BoogieIcfgContainer [2021-10-13 07:18:38,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:18:38,609 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:18:38,610 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:18:38,610 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:18:38,610 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:35" (3/4) ... [2021-10-13 07:18:38,615 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:18:38,627 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-13 07:18:38,627 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:18:38,627 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:18:38,628 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:18:38,676 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:18:38,676 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:18:38,677 INFO L168 Benchmark]: Toolchain (without parser) took 604080.30 ms. Allocated memory was 62.9 MB in the beginning and 3.9 GB in the end (delta: 3.8 GB). Free memory was 43.3 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. [2021-10-13 07:18:38,678 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:18:38,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.06 ms. Allocated memory is still 62.9 MB. Free memory was 43.1 MB in the beginning and 46.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:38,679 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.18 ms. Allocated memory is still 62.9 MB. Free memory was 46.5 MB in the beginning and 44.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:18:38,679 INFO L168 Benchmark]: Boogie Preprocessor took 37.11 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 43.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:18:38,680 INFO L168 Benchmark]: RCFGBuilder took 354.17 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 34.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:18:38,680 INFO L168 Benchmark]: TraceAbstraction took 603278.66 ms. Allocated memory was 62.9 MB in the beginning and 3.9 GB in the end (delta: 3.8 GB). Free memory was 33.5 MB in the beginning and 2.0 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.1 GB. [2021-10-13 07:18:38,680 INFO L168 Benchmark]: Witness Printer took 66.99 ms. Allocated memory is still 3.9 GB. Free memory was 2.0 GB in the beginning and 2.0 GB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:18:38,683 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.06 ms. Allocated memory is still 62.9 MB. Free memory was 43.1 MB in the beginning and 46.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.18 ms. Allocated memory is still 62.9 MB. Free memory was 46.5 MB in the beginning and 44.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.11 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 43.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 354.17 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 34.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 603278.66 ms. Allocated memory was 62.9 MB in the beginning and 3.9 GB in the end (delta: 3.8 GB). Free memory was 33.5 MB in the beginning and 2.0 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.1 GB. * Witness Printer took 66.99 ms. Allocated memory is still 3.9 GB. Free memory was 2.0 GB in the beginning and 2.0 GB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 603198.2ms, OverallIterations: 14, TraceHistogramMax: 124, EmptinessCheckTime: 129.7ms, AutomataDifference: 130473.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 377894.4ms, InitialAbstractionConstructionTime: 10.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 342 SDtfs, 4133 SDslu, 5031 SDs, 0 SdLazy, 26556 SolverSat, 1477 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24337.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9008 GetRequests, 8153 SyntacticMatches, 14 SemanticMatches, 841 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24688 ImplicationChecksByTransitivity, 111056.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16822occurred in iteration=12, InterpolantAutomatonStates: 573, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6259.1ms AutomataMinimizationTime, 14 MinimizatonAttempts, 6766 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7948 NumberOfFragments, 88 HoareAnnotationTreeSize, 2 FomulaSimplifications, 2002962138 FormulaSimplificationTreeSizeReduction, 356573.3ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 212225 FormulaSimplificationTreeSizeReductionInter, 21282.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 371.4ms SsaConstructionTime, 1718.2ms SatisfiabilityAnalysisTime, 58720.7ms InterpolantComputationTime, 4299 NumberOfCodeBlocks, 3042 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 8532 ConstructedInterpolants, 184 QuantifiedInterpolants, 33784 SizeOfPredicates, 69 NumberOfNonLiveVariables, 4119 ConjunctsInSsa, 512 ConjunctsInUnsatCore, 66 InterpolantComputations, 7 PerfectInterpolantSequences, 287966/340384 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((!~bvslt32(c, 200000bv32) && cond == 1bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32)) || ((a == 0bv32 && a == b) && c == 0bv32) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((b == 0bv32 && st == 1bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32)) || (((st == 1bv32 && cond == 1bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32))) || (((~bvslt32(last, 200000bv32) && cond == 1bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32))) || (((~bvslt32(last, 200000bv32) && a == 0bv32) && a == b) && ~bvslt32(~bvadd64(4294967295bv32, c), 200000bv32)) RESULT: Ultimate proved your program to be correct! [2021-10-13 07:18:38,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef2eeb22-d2b5-44ba-b8e4-71421a1d01e3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...