./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7 --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 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:05:23,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:05:23,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:05:23,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:05:23,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:05:23,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:05:23,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:05:23,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:05:23,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:05:23,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:05:23,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:05:23,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:05:23,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:05:23,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:05:23,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:05:23,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:05:23,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:05:23,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:05:23,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:05:23,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:05:23,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:05:23,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:05:23,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:05:23,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:05:23,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:05:23,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:05:23,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:05:23,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:05:23,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:05:23,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:05:23,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:05:23,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:05:23,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:05:23,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:05:23,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:05:23,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:05:23,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:05:23,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:05:23,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:05:23,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:05:23,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:05:23,620 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:05:23,660 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:05:23,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:05:23,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:05:23,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:05:23,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:05:23,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:05:23,668 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:05:23,668 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:05:23,669 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:05:23,669 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:05:23,670 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:05:23,670 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:05:23,670 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:05:23,670 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:05:23,671 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:05:23,671 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:05:23,671 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:05:23,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:05:23,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:05:23,673 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:05:23,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:05:23,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:05:23,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:05:23,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:05:23,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:05:23,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:05:23,675 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:05:23,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:05:23,676 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:05:23,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:05:23,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:05:23,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:05:23,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:05:23,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:05:23,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:05:23,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:05:23,678 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:05:23,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:05:23,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:05:23,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:05:23,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:05:23,679 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 [2021-11-25 20:05:23,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:05:23,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:05:24,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:05:24,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:05:24,003 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:05:24,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2021-11-25 20:05:24,086 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data/67d002e83/54d2f3e547e5491d85fa86e779b757f8/FLAGee26f929a [2021-11-25 20:05:24,643 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:05:24,644 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2021-11-25 20:05:24,655 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data/67d002e83/54d2f3e547e5491d85fa86e779b757f8/FLAGee26f929a [2021-11-25 20:05:25,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data/67d002e83/54d2f3e547e5491d85fa86e779b757f8 [2021-11-25 20:05:25,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:05:25,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:05:25,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:25,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:05:25,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:05:25,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ad7b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25, skipping insertion in model container [2021-11-25 20:05:25,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:05:25,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:05:25,343 WARN L230 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2021-11-25 20:05:25,348 WARN L230 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2021-11-25 20:05:25,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:25,402 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:05:25,430 WARN L230 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2021-11-25 20:05:25,431 WARN L230 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2021-11-25 20:05:25,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:25,471 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:05:25,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25 WrapperNode [2021-11-25 20:05:25,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:25,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:05:25,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:05:25,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:05:25,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,551 INFO L137 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2021-11-25 20:05:25,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:05:25,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:05:25,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:05:25,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:05:25,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:05:25,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:05:25,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:05:25,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:05:25,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (1/1) ... [2021-11-25 20:05:25,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:05:25,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:25,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:05:25,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:05:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:05:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 20:05:25,712 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 20:05:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:05:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:05:25,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:05:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:05:25,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:05:25,784 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:05:25,786 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:05:26,030 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:05:26,152 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:05:26,152 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:05:26,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:05:26 BoogieIcfgContainer [2021-11-25 20:05:26,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:05:26,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:05:26,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:05:26,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:05:26,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:05:25" (1/3) ... [2021-11-25 20:05:26,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1719080d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:05:26, skipping insertion in model container [2021-11-25 20:05:26,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:25" (2/3) ... [2021-11-25 20:05:26,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1719080d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:05:26, skipping insertion in model container [2021-11-25 20:05:26,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:05:26" (3/3) ... [2021-11-25 20:05:26,174 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_3a.c.cil.c [2021-11-25 20:05:26,179 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:05:26,179 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 20:05:26,222 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:05:26,229 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, mAutomataTypeConcurrency=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 [2021-11-25 20:05:26,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 20:05:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 38 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:05:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:05:26,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:26,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:05:26,253 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:05:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash 7112936, now seen corresponding path program 1 times [2021-11-25 20:05:26,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:26,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626263276] [2021-11-25 20:05:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:26,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:05:26,353 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:05:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:05:26,382 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 20:05:26,384 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:05:26,385 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-25 20:05:26,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-25 20:05:26,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:05:26,391 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-25 20:05:26,394 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:05:26,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:05:26 BoogieIcfgContainer [2021-11-25 20:05:26,411 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:05:26,412 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:05:26,412 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:05:26,412 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:05:26,413 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:05:26" (3/4) ... [2021-11-25 20:05:26,415 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 20:05:26,415 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:05:26,417 INFO L158 Benchmark]: Toolchain (without parser) took 1322.82ms. Allocated memory was 100.7MB in the beginning and 138.4MB in the end (delta: 37.7MB). Free memory was 68.9MB in the beginning and 76.6MB in the end (delta: -7.7MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. [2021-11-25 20:05:26,417 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 100.7MB. Free memory was 52.9MB in the beginning and 52.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:05:26,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.13ms. Allocated memory was 100.7MB in the beginning and 138.4MB in the end (delta: 37.7MB). Free memory was 68.6MB in the beginning and 110.2MB in the end (delta: -41.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:05:26,419 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.92ms. Allocated memory is still 138.4MB. Free memory was 110.2MB in the beginning and 108.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:05:26,420 INFO L158 Benchmark]: Boogie Preprocessor took 66.08ms. Allocated memory is still 138.4MB. Free memory was 108.9MB in the beginning and 106.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:05:26,420 INFO L158 Benchmark]: RCFGBuilder took 535.67ms. Allocated memory is still 138.4MB. Free memory was 106.8MB in the beginning and 90.8MB in the end (delta: 16.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-25 20:05:26,421 INFO L158 Benchmark]: TraceAbstraction took 249.87ms. Allocated memory is still 138.4MB. Free memory was 90.0MB in the beginning and 77.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 20:05:26,422 INFO L158 Benchmark]: Witness Printer took 3.86ms. Allocated memory is still 138.4MB. Free memory was 77.4MB in the beginning and 76.6MB in the end (delta: 774.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:05:26,425 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 100.7MB. Free memory was 52.9MB in the beginning and 52.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.13ms. Allocated memory was 100.7MB in the beginning and 138.4MB in the end (delta: 37.7MB). Free memory was 68.6MB in the beginning and 110.2MB in the end (delta: -41.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.92ms. Allocated memory is still 138.4MB. Free memory was 110.2MB in the beginning and 108.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.08ms. Allocated memory is still 138.4MB. Free memory was 108.9MB in the beginning and 106.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 535.67ms. Allocated memory is still 138.4MB. Free memory was 106.8MB in the beginning and 90.8MB in the end (delta: 16.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 249.87ms. Allocated memory is still 138.4MB. Free memory was 90.0MB in the beginning and 77.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 3.86ms. Allocated memory is still 138.4MB. Free memory was 77.4MB in the beginning and 76.6MB in the end (delta: 774.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L320] COND TRUE __VERIFIER_nondet_int() [L321] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.399f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 20:05:26,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7 --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 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:05:28,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:05:28,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:05:28,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:05:28,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:05:28,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:05:28,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:05:28,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:05:28,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:05:28,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:05:28,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:05:28,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:05:28,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:05:28,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:05:28,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:05:29,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:05:29,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:05:29,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:05:29,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:05:29,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:05:29,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:05:29,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:05:29,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:05:29,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:05:29,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:05:29,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:05:29,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:05:29,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:05:29,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:05:29,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:05:29,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:05:29,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:05:29,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:05:29,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:05:29,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:05:29,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:05:29,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:05:29,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:05:29,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:05:29,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:05:29,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:05:29,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 20:05:29,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:05:29,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:05:29,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:05:29,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:05:29,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:05:29,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:05:29,092 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:05:29,092 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:05:29,092 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:05:29,092 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:05:29,093 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:05:29,094 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:05:29,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:05:29,095 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:05:29,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:05:29,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:05:29,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:05:29,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:05:29,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:05:29,097 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:05:29,097 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:05:29,098 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:05:29,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:05:29,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:05:29,098 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:05:29,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:05:29,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:05:29,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:05:29,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:05:29,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:05:29,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:05:29,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:05:29,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:05:29,101 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:05:29,102 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:05:29,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:05:29,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:05:29,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:05:29,103 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 [2021-11-25 20:05:29,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:05:29,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:05:29,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:05:29,549 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:05:29,550 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:05:29,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2021-11-25 20:05:29,618 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data/55ad298e9/0ecb33c7a69849c099915a4e195388cf/FLAG4f2607532 [2021-11-25 20:05:30,191 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:05:30,199 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2021-11-25 20:05:30,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data/55ad298e9/0ecb33c7a69849c099915a4e195388cf/FLAG4f2607532 [2021-11-25 20:05:30,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/data/55ad298e9/0ecb33c7a69849c099915a4e195388cf [2021-11-25 20:05:30,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:05:30,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:05:30,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:30,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:05:30,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:05:30,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:30" (1/1) ... [2021-11-25 20:05:30,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d96716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:30, skipping insertion in model container [2021-11-25 20:05:30,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:30" (1/1) ... [2021-11-25 20:05:30,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:05:30,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:05:30,829 WARN L230 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2021-11-25 20:05:30,834 WARN L230 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2021-11-25 20:05:30,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:30,920 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:05:30,948 WARN L230 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2021-11-25 20:05:30,949 WARN L230 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_1dc58c67-934b-4833-8ed3-7f769eb846a6/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2021-11-25 20:05:30,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:31,012 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:05:31,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31 WrapperNode [2021-11-25 20:05:31,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:31,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:05:31,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:05:31,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:05:31,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,078 INFO L137 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2021-11-25 20:05:31,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:05:31,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:05:31,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:05:31,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:05:31,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:05:31,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:05:31,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:05:31,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:05:31,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (1/1) ... [2021-11-25 20:05:31,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:05:31,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:31,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:05:31,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:05:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:05:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:05:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 20:05:31,234 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 20:05:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:05:31,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:05:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:05:31,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:05:31,356 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:05:31,370 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:05:33,878 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:05:33,903 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:05:33,903 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:05:33,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:05:33 BoogieIcfgContainer [2021-11-25 20:05:33,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:05:33,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:05:33,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:05:33,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:05:33,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:05:30" (1/3) ... [2021-11-25 20:05:33,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0af14b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:05:33, skipping insertion in model container [2021-11-25 20:05:33,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:31" (2/3) ... [2021-11-25 20:05:33,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0af14b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:05:33, skipping insertion in model container [2021-11-25 20:05:33,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:05:33" (3/3) ... [2021-11-25 20:05:33,913 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_3a.c.cil.c [2021-11-25 20:05:33,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:05:33,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 20:05:33,964 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:05:33,971 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, mAutomataTypeConcurrency=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 [2021-11-25 20:05:33,972 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 20:05:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 20:05:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:05:33,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:33,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:33,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:05:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:34,004 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-25 20:05:34,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:34,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617081830] [2021-11-25 20:05:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:34,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:34,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:34,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:34,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:05:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:34,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 20:05:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:34,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:34,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:34,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617081830] [2021-11-25 20:05:34,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617081830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:34,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:34,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:05:34,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708724739] [2021-11-25 20:05:34,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:34,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:05:34,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:34,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:05:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:05:34,578 INFO L87 Difference]: Start difference. First operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:34,606 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2021-11-25 20:05:34,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:05:34,608 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:05:34,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:34,616 INFO L225 Difference]: With dead ends: 115 [2021-11-25 20:05:34,616 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 20:05:34,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:05:34,623 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:34,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:05:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 20:05:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-25 20:05:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 20:05:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-11-25 20:05:34,664 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2021-11-25 20:05:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:34,664 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-11-25 20:05:34,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-11-25 20:05:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:05:34,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:34,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:34,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:34,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:34,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:05:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:34,886 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-25 20:05:34,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:34,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005681257] [2021-11-25 20:05:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:34,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:34,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:34,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:34,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:16:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:43,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:16:43,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:58,627 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-25 20:17:48,541 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-11-25 20:17:50,594 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-11-25 20:17:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:50,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:50,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:17:50,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005681257] [2021-11-25 20:17:50,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005681257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:50,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:50,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:17:50,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866960786] [2021-11-25 20:17:50,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:50,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:17:50,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:17:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:17:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-11-25 20:17:50,600 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:53,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:17:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:53,225 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-11-25 20:17:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:17:53,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:17:53,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:53,228 INFO L225 Difference]: With dead ends: 51 [2021-11-25 20:17:53,229 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 20:17:53,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2021-11-25 20:17:53,231 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:53,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 175 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 135 Unchecked, 2.4s Time] [2021-11-25 20:17:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 20:17:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-25 20:17:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 20:17:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2021-11-25 20:17:53,244 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 7 [2021-11-25 20:17:53,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:53,244 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2021-11-25 20:17:53,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2021-11-25 20:17:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 20:17:53,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:53,248 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:53,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:53,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:17:53,462 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 220430878, now seen corresponding path program 1 times [2021-11-25 20:17:53,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:17:53,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829809545] [2021-11-25 20:17:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:53,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:17:53,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:17:53,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:17:53,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 20:17:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:17:53,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:17:53,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:53,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:17:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829809545] [2021-11-25 20:17:53,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829809545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:53,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:53,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:17:53,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794560465] [2021-11-25 20:17:53,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:53,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:17:53,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:17:53,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:17:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:17:53,845 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:17:54,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:54,146 INFO L93 Difference]: Finished difference Result 102 states and 148 transitions. [2021-11-25 20:17:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:17:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-11-25 20:17:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:54,152 INFO L225 Difference]: With dead ends: 102 [2021-11-25 20:17:54,152 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 20:17:54,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:54,155 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:54,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:17:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 20:17:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2021-11-25 20:17:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:17:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2021-11-25 20:17:54,179 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2021-11-25 20:17:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:54,180 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2021-11-25 20:17:54,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:17:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2021-11-25 20:17:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:17:54,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:54,184 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:54,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:54,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:17:54,386 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1744233432, now seen corresponding path program 1 times [2021-11-25 20:17:54,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:17:54,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958943240] [2021-11-25 20:17:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:54,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:17:54,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:17:54,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:17:54,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 20:17:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:54,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:17:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:17:54,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:54,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:17:54,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958943240] [2021-11-25 20:17:54,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958943240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:54,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:54,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:17:54,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336600540] [2021-11-25 20:17:54,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:54,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:17:54,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:17:54,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:17:54,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:17:54,796 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:17:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:55,047 INFO L93 Difference]: Finished difference Result 106 states and 151 transitions. [2021-11-25 20:17:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:17:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2021-11-25 20:17:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:55,051 INFO L225 Difference]: With dead ends: 106 [2021-11-25 20:17:55,051 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 20:17:55,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:55,054 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:55,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:17:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 20:17:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-11-25 20:17:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:17:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2021-11-25 20:17:55,070 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2021-11-25 20:17:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:55,071 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2021-11-25 20:17:55,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:17:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2021-11-25 20:17:55,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 20:17:55,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:55,075 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:55,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-25 20:17:55,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:17:55,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:55,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1089123319, now seen corresponding path program 1 times [2021-11-25 20:17:55,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:17:55,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959237697] [2021-11-25 20:17:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:55,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:17:55,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:17:55,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:17:55,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 20:17:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:17:55,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:17:55,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:55,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:17:55,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959237697] [2021-11-25 20:17:55,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959237697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:55,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:55,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:17:55,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726531764] [2021-11-25 20:17:55,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:55,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:17:55,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:17:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:17:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:17:55,717 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:17:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:55,995 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2021-11-25 20:17:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:17:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-11-25 20:17:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:55,998 INFO L225 Difference]: With dead ends: 115 [2021-11-25 20:17:55,999 INFO L226 Difference]: Without dead ends: 67 [2021-11-25 20:17:56,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:56,002 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:56,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:17:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-25 20:17:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-11-25 20:17:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:17:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-11-25 20:17:56,018 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2021-11-25 20:17:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:56,019 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-11-25 20:17:56,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:17:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-11-25 20:17:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 20:17:56,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:56,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:56,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:56,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:17:56,238 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash 957340839, now seen corresponding path program 1 times [2021-11-25 20:17:56,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:17:56,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104144877] [2021-11-25 20:17:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:56,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:17:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:17:56,241 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:17:56,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 20:17:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:17:56,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:17:56,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:56,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:17:56,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104144877] [2021-11-25 20:17:56,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104144877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:56,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:56,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:17:56,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660148173] [2021-11-25 20:17:56,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:56,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:17:56,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:17:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:17:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:56,676 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:17:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:57,146 INFO L93 Difference]: Finished difference Result 123 states and 174 transitions. [2021-11-25 20:17:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:17:57,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-11-25 20:17:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:57,149 INFO L225 Difference]: With dead ends: 123 [2021-11-25 20:17:57,150 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 20:17:57,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:57,155 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:57,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 198 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:17:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 20:17:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2021-11-25 20:17:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 50 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:17:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2021-11-25 20:17:57,173 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 47 [2021-11-25 20:17:57,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:57,174 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2021-11-25 20:17:57,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:17:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2021-11-25 20:17:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 20:17:57,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:57,178 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:57,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:57,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:17:57,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1066513524, now seen corresponding path program 1 times [2021-11-25 20:17:57,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:17:57,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938423291] [2021-11-25 20:17:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:57,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:17:57,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:17:57,403 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:17:57,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 20:17:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:57,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:17:57,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:17:57,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:17:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:17:58,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:17:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938423291] [2021-11-25 20:17:58,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938423291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:17:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209291262] [2021-11-25 20:17:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:58,471 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:17:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:17:58,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:17:58,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 20:17:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:17:58,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:17:58,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:58,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209291262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:58,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:17:58,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2021-11-25 20:17:58,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165735107] [2021-11-25 20:17:58,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:58,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:58,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:17:58,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:17:58,751 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:17:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:58,771 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2021-11-25 20:17:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:58,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-11-25 20:17:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:58,773 INFO L225 Difference]: With dead ends: 67 [2021-11-25 20:17:58,774 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 20:17:58,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:17:58,775 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:58,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:17:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 20:17:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-25 20:17:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:17:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2021-11-25 20:17:58,787 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 48 [2021-11-25 20:17:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:58,788 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2021-11-25 20:17:58,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:17:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2021-11-25 20:17:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:17:58,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:58,792 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:58,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:59,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-25 20:17:59,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:17:59,212 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:59,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:59,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1967363502, now seen corresponding path program 1 times [2021-11-25 20:17:59,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:17:59,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533843305] [2021-11-25 20:17:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:59,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:17:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:17:59,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:17:59,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 20:17:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:59,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:17:59,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:17:59,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:00,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533843305] [2021-11-25 20:18:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533843305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:00,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1384564834] [2021-11-25 20:18:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:00,193 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:00,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:00,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-25 20:18:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:00,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:18:00,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:18:00,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:00,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1384564834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:00,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:18:00,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2021-11-25 20:18:00,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523333523] [2021-11-25 20:18:00,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:00,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:18:00,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:18:00,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:18:00,568 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:18:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:00,667 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2021-11-25 20:18:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:18:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-11-25 20:18:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:00,674 INFO L225 Difference]: With dead ends: 68 [2021-11-25 20:18:00,674 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 20:18:00,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:18:00,676 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:00,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 184 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:18:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 20:18:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-25 20:18:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:18:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2021-11-25 20:18:00,689 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 50 [2021-11-25 20:18:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:00,689 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2021-11-25 20:18:00,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:18:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2021-11-25 20:18:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:18:00,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:00,692 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:00,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:00,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:01,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:01,105 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:01,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1518257168, now seen corresponding path program 1 times [2021-11-25 20:18:01,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:01,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189988793] [2021-11-25 20:18:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:01,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:01,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:01,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:01,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 20:18:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:01,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:18:01,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:01,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:02,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:02,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189988793] [2021-11-25 20:18:02,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189988793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116513768] [2021-11-25 20:18:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:02,135 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:02,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:02,142 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:02,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-25 20:18:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:18:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:18:02,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:02,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116513768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:02,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:18:02,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2021-11-25 20:18:02,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12309899] [2021-11-25 20:18:02,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:02,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:02,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:02,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:18:02,682 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:18:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:02,881 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2021-11-25 20:18:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:18:02,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-11-25 20:18:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:02,889 INFO L225 Difference]: With dead ends: 98 [2021-11-25 20:18:02,889 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 20:18:02,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:18:02,893 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 15 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:02,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 287 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 20:18:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2021-11-25 20:18:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 58 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-25 20:18:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-11-25 20:18:02,924 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 50 [2021-11-25 20:18:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:02,924 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-11-25 20:18:02,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:18:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-11-25 20:18:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:18:02,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:02,930 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:02,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:03,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-25 20:18:03,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:18:03,332 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash 931451154, now seen corresponding path program 1 times [2021-11-25 20:18:03,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:03,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111737062] [2021-11-25 20:18:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:03,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:03,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:03,334 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:03,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 20:18:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:03,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:18:03,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:03,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:04,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111737062] [2021-11-25 20:18:04,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111737062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:04,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [942299422] [2021-11-25 20:18:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:04,311 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:04,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:04,318 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:04,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-25 20:18:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:04,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:18:04,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:18:04,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:18:05,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [942299422] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:05,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382478546] [2021-11-25 20:18:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:05,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:05,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:05,222 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:05,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 20:18:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:05,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:18:05,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:18:05,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:18:05,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382478546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:05,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:18:05,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 12 [2021-11-25 20:18:05,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478326502] [2021-11-25 20:18:05,834 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:05,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:18:05,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:18:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:18:05,836 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:18:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:07,662 INFO L93 Difference]: Finished difference Result 186 states and 270 transitions. [2021-11-25 20:18:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:18:07,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 50 [2021-11-25 20:18:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:07,668 INFO L225 Difference]: With dead ends: 186 [2021-11-25 20:18:07,668 INFO L226 Difference]: Without dead ends: 127 [2021-11-25 20:18:07,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:18:07,671 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:07,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 375 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:18:07,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-25 20:18:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2021-11-25 20:18:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 84 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-25 20:18:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 137 transitions. [2021-11-25 20:18:07,693 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 137 transitions. Word has length 50 [2021-11-25 20:18:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:07,693 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 137 transitions. [2021-11-25 20:18:07,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:18:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 137 transitions. [2021-11-25 20:18:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:18:07,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:07,703 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:07,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:07,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:08,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:08,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:08,319 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1265138967, now seen corresponding path program 1 times [2021-11-25 20:18:08,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:08,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081795439] [2021-11-25 20:18:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:08,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:08,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:08,321 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:08,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 20:18:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:18:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:08,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:09,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:09,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081795439] [2021-11-25 20:18:09,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081795439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:09,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [713232870] [2021-11-25 20:18:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:09,352 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:09,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:09,353 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:09,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 20:18:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:09,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:18:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 20:18:09,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:09,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [713232870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:09,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:18:09,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2021-11-25 20:18:09,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672600980] [2021-11-25 20:18:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:09,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:18:09,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:18:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:18:09,819 INFO L87 Difference]: Start difference. First operand 96 states and 137 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:18:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:10,051 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2021-11-25 20:18:10,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:18:10,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2021-11-25 20:18:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:10,056 INFO L225 Difference]: With dead ends: 119 [2021-11-25 20:18:10,056 INFO L226 Difference]: Without dead ends: 113 [2021-11-25 20:18:10,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:18:10,058 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 22 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:10,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 229 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-25 20:18:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-11-25 20:18:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.303030303030303) internal successors, (129), 99 states have internal predecessors, (129), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-25 20:18:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2021-11-25 20:18:10,076 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 54 [2021-11-25 20:18:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:10,076 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2021-11-25 20:18:10,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:18:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2021-11-25 20:18:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:18:10,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:10,079 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:10,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:10,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:10,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:18:10,481 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1322397269, now seen corresponding path program 1 times [2021-11-25 20:18:10,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:10,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542178144] [2021-11-25 20:18:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:10,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:10,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:10,483 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:10,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 20:18:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:10,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:18:10,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:10,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:11,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:11,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542178144] [2021-11-25 20:18:11,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542178144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:11,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1641158348] [2021-11-25 20:18:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:11,571 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:11,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:11,572 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:11,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-25 20:18:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:11,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:18:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:11,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:12,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1641158348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:12,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456433056] [2021-11-25 20:18:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:12,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:12,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:12,418 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:12,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 20:18:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:12,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:18:12,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:18:13,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 20:18:13,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456433056] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:13,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-25 20:18:13,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2021-11-25 20:18:13,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98141393] [2021-11-25 20:18:13,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:13,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:13,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:18:13,474 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:18:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:13,719 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2021-11-25 20:18:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:18:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2021-11-25 20:18:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:13,725 INFO L225 Difference]: With dead ends: 117 [2021-11-25 20:18:13,725 INFO L226 Difference]: Without dead ends: 100 [2021-11-25 20:18:13,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:18:13,727 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:13,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 298 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-25 20:18:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-25 20:18:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 89 states have internal predecessors, (114), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-25 20:18:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2021-11-25 20:18:13,742 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 54 [2021-11-25 20:18:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:13,743 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2021-11-25 20:18:13,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:18:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2021-11-25 20:18:13,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:18:13,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:13,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:13,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:13,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:14,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:14,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:14,370 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1182884870, now seen corresponding path program 1 times [2021-11-25 20:18:14,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:14,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937839187] [2021-11-25 20:18:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:14,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:14,373 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:14,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 20:18:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:14,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:18:14,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:14,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:15,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:15,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937839187] [2021-11-25 20:18:15,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937839187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [105751176] [2021-11-25 20:18:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:15,505 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:15,506 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:15,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-25 20:18:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:15,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:18:15,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:15,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:16,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [105751176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:16,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354648401] [2021-11-25 20:18:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:16,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:16,308 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:16,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 20:18:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:18:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:16,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:17,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354648401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:17,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:18:17,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 15 [2021-11-25 20:18:17,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218436765] [2021-11-25 20:18:17,527 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:17,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 20:18:17,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:17,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 20:18:17,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:18:17,529 INFO L87 Difference]: Start difference. First operand 100 states and 135 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:18:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:18,796 INFO L93 Difference]: Finished difference Result 224 states and 309 transitions. [2021-11-25 20:18:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:18:18,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2021-11-25 20:18:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:18,800 INFO L225 Difference]: With dead ends: 224 [2021-11-25 20:18:18,800 INFO L226 Difference]: Without dead ends: 132 [2021-11-25 20:18:18,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:18:18,802 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 174 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:18,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 294 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:18:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-25 20:18:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2021-11-25 20:18:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.315217391304348) internal successors, (121), 93 states have internal predecessors, (121), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-25 20:18:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2021-11-25 20:18:18,819 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 56 [2021-11-25 20:18:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:18,819 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2021-11-25 20:18:18,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:18:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2021-11-25 20:18:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 20:18:18,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:18,822 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:18,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:19,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-25 20:18:19,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-25 20:18:19,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:18:19,425 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1175617949, now seen corresponding path program 1 times [2021-11-25 20:18:19,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:19,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366990654] [2021-11-25 20:18:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:19,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:19,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:19,427 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:19,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 20:18:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:18:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:20,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:21,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:21,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366990654] [2021-11-25 20:18:21,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366990654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:21,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [985488680] [2021-11-25 20:18:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:21,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:21,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:21,181 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:21,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-25 20:18:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:18:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:21,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:22,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [985488680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111400023] [2021-11-25 20:18:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:22,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:22,270 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:22,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 20:18:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:22,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:18:22,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:23,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:24,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111400023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:24,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:18:24,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-25 20:18:24,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29513618] [2021-11-25 20:18:24,569 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:24,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 20:18:24,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:24,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 20:18:24,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:18:24,580 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:18:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:27,979 INFO L93 Difference]: Finished difference Result 271 states and 386 transitions. [2021-11-25 20:18:27,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:18:27,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2021-11-25 20:18:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:27,983 INFO L225 Difference]: With dead ends: 271 [2021-11-25 20:18:27,983 INFO L226 Difference]: Without dead ends: 175 [2021-11-25 20:18:27,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2021-11-25 20:18:27,985 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 233 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:27,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 615 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 20:18:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-25 20:18:28,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 118. [2021-11-25 20:18:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.3584905660377358) internal successors, (144), 107 states have internal predecessors, (144), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-25 20:18:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2021-11-25 20:18:28,008 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 63 [2021-11-25 20:18:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:28,008 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2021-11-25 20:18:28,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:18:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2021-11-25 20:18:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 20:18:28,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:28,011 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:28,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-25 20:18:28,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-25 20:18:28,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:28,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:28,614 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:28,614 INFO L85 PathProgramCache]: Analyzing trace with hash 369916166, now seen corresponding path program 2 times [2021-11-25 20:18:28,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:28,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900397365] [2021-11-25 20:18:28,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:18:28,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:28,616 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:28,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-25 20:18:28,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:18:28,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:28,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:18:28,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:29,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:30,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:30,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900397365] [2021-11-25 20:18:30,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900397365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:30,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1626330638] [2021-11-25 20:18:30,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:18:30,760 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:30,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:30,774 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:30,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-25 20:18:30,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:18:30,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:30,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:18:30,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:31,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:31,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1626330638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:31,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458462849] [2021-11-25 20:18:31,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:18:31,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:31,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:31,950 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:31,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 20:18:32,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:18:32,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:32,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:18:32,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:32,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:34,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458462849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:34,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:18:34,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 27 [2021-11-25 20:18:34,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951529805] [2021-11-25 20:18:34,413 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:34,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 20:18:34,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 20:18:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:18:34,416 INFO L87 Difference]: Start difference. First operand 118 states and 165 transitions. Second operand has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:18:38,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:38,229 INFO L93 Difference]: Finished difference Result 294 states and 417 transitions. [2021-11-25 20:18:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 20:18:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2021-11-25 20:18:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:38,233 INFO L225 Difference]: With dead ends: 294 [2021-11-25 20:18:38,234 INFO L226 Difference]: Without dead ends: 184 [2021-11-25 20:18:38,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=581, Invalid=1059, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 20:18:38,237 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 502 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:38,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 726 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 20:18:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-25 20:18:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2021-11-25 20:18:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.3879310344827587) internal successors, (161), 117 states have internal predecessors, (161), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-25 20:18:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 182 transitions. [2021-11-25 20:18:38,258 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 182 transitions. Word has length 68 [2021-11-25 20:18:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:38,259 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 182 transitions. [2021-11-25 20:18:38,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:18:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 182 transitions. [2021-11-25 20:18:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 20:18:38,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:38,261 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:38,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:38,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-25 20:18:38,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:38,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:38,870 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:38,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:38,871 INFO L85 PathProgramCache]: Analyzing trace with hash -542294301, now seen corresponding path program 2 times [2021-11-25 20:18:38,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:38,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829111800] [2021-11-25 20:18:38,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:18:38,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:38,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:38,873 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:38,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-25 20:18:38,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:18:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:38,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:18:38,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:40,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:43,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:43,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829111800] [2021-11-25 20:18:43,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829111800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:43,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1018624295] [2021-11-25 20:18:43,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:18:43,106 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:43,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:43,107 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:43,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-25 20:18:43,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:18:43,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:43,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:18:43,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:43,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:44,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1018624295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:44,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768631822] [2021-11-25 20:18:44,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:18:44,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:44,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:44,771 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:44,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-25 20:18:44,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:18:44,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:18:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:45,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:49,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768631822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:49,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:18:49,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2021-11-25 20:18:49,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493490204] [2021-11-25 20:18:49,678 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:49,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 20:18:49,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:49,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 20:18:49,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:18:49,682 INFO L87 Difference]: Start difference. First operand 128 states and 182 transitions. Second operand has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:19:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:02,566 INFO L93 Difference]: Finished difference Result 397 states and 586 transitions. [2021-11-25 20:19:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 20:19:02,568 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2021-11-25 20:19:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:02,572 INFO L225 Difference]: With dead ends: 397 [2021-11-25 20:19:02,572 INFO L226 Difference]: Without dead ends: 277 [2021-11-25 20:19:02,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1210, Invalid=2330, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 20:19:02,576 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 837 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:02,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 1746 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-25 20:19:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-25 20:19:02,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 154. [2021-11-25 20:19:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.4366197183098592) internal successors, (204), 143 states have internal predecessors, (204), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-25 20:19:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 225 transitions. [2021-11-25 20:19:02,614 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 225 transitions. Word has length 81 [2021-11-25 20:19:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:02,615 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 225 transitions. [2021-11-25 20:19:02,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:19:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 225 transitions. [2021-11-25 20:19:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 20:19:02,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:02,618 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:02,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:02,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-25 20:19:03,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-25 20:19:03,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:19:03,246 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1098654470, now seen corresponding path program 3 times [2021-11-25 20:19:03,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:19:03,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347456001] [2021-11-25 20:19:03,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:19:03,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:19:03,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:19:03,249 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:19:03,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-25 20:19:03,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-25 20:19:03,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:19:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 20:19:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:19:07,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:19:15,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:19:15,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347456001] [2021-11-25 20:19:15,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347456001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:15,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [232682099] [2021-11-25 20:19:15,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:19:15,861 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:19:15,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:19:15,861 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:19:15,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-25 20:19:16,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-25 20:19:16,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:19:16,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 20:19:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:19:32,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:19:34,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [232682099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:34,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688221506] [2021-11-25 20:19:34,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:19:34,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:34,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:34,927 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:34,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dc58c67-934b-4833-8ed3-7f769eb846a6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 20:19:35,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-25 20:19:35,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:19:35,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 20:19:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:19:42,534 INFO L328 TraceCheckSpWp]: Computing backward predicates...